VICP Registry Case Source Bundle
Canonical URL: https://vicp-registry.org/case/USCOURTS-cofc-1_07-vv-00810
Package ID: USCOURTS-cofc-1_07-vv-00810
Petitioner: PETER and CHERIE NUTTALL, as the legal representatives of their minor son, N.N.
Filed: 2007-11-19
Decided: 2015-01-20
Vaccine: MMR
Vaccination date: 2004-11-22
Condition: severe neurologic disorder, diagnosed as childhood disintegrative disorder (CDD), alleged sequela of encephalitis
Outcome: denied
Award amount USD: 

AI-assisted case summary:
On November 19, 2007, Peter and Cherie Nuttall filed a petition on behalf of their minor son, N.N., alleging that N.N. developed Childhood Disintegrative Disorder (CDD) as a sequela of encephalitis caused by either the MMR or DTaP vaccination administered on November 22, 2004. N.N. was born on September 11, 2000. His early medical history was unremarkable, except for a note at approximately five months old of "probable mild clonic jerking with transition to sleep phase." He received the DTaP, MMR, and inactivated poliovirus vaccines on November 22, 2004, with no documented adverse reaction. The first signs of regression, including speech and developmental delay, were noted in June 2005, with a diagnosis of CDD by Dr. Joan Carapucci. A CT scan in July 2005 and an MRI in November 2005 were interpreted as normal. In 2011, an MRI was performed, interpreted by Dr. Jose Bauza as showing abnormalities consistent with previous encephalitis. Petitioners amended their petition in November 2011, shifting their theory to a "Table Injury" claim, specifically post-vaccinal limbic encephalitis, arguing that N.N.'s CDD was a sequela of this encephalitis. They waived any causation-in-fact argument. A fact hearing was held in June 2008, and Special Master Christian Moran issued findings in March 2009, determining that N.N.'s language began to decrease in November 2004 and he experienced separation anxiety on November 30, 2004. The case was stayed pending the outcome of the Omnibus Autism Proceeding test cases. An expert hearing was held on January 25, 2013, before Special Master George L. Hastings. Petitioners presented Dr. Robert M. Shuman, a pediatric neurologist and legal consultant, and Respondent presented Dr. Max Wiznitzer, a pediatric neurologist. Both experts agreed N.N.'s clinical course was consistent with either CDD or limbic encephalitis. The case hinged on the interpretation of N.N.'s 2005 and 2011 MRI scans. Dr. Shuman identified five alleged abnormalities indicative of past encephalitis: trigonal hyperintensities, hippocampal hyperintensity, ventricle lining hyperintensity, enlarged ventricles, and fornix hyperintensity. Dr. Wiznitzer countered each of these points, arguing they represented normal developmental variants or MRI artifacts, supported by medical literature. Special Master Hastings found Dr. Wiznitzer's interpretations more persuasive, noting that Dr. Shuman's assertions were often unsupported by literature and that Dr. Shuman had retired from clinical practice in 2006. He also gave little weight to Dr. Bauza's report, finding it lacked independent reasoning and was influenced by Dr. Shuman. On January 20, 2015, Special Master Hastings denied compensation, finding that Petitioners failed to establish that N.N. experienced any brain inflammation. The Court of Federal Claims, Judge Nancy B. Firestone, affirmed this decision on August 19, 2015, deferring to the Special Master's credibility determinations and finding no arbitrary or capricious action in the evaluation of the evidence, including Dr. Bauza's report. The court found that Dr. Wiznitzer's testimony, supported by medical literature, was more persuasive.

Theory of causation field:
Petitioners alleged that N.N., vaccinated with MMR and DTaP on November 22, 2004 (age 4.19), suffered a Table Injury of encephalitis, specifically limbic encephalitis, with CDD as a sequela. They explicitly waived any causation-in-fact argument, relying solely on the Table Injury presumption. The claim required proof of encephalitis with onset within 5-15 days of MMR or 72 hours of DTaP. The central issue was the interpretation of N.N.'s 2005 and 2011 MRI scans. Petitioners' expert, Dr. Robert Shuman, interpreted the MRIs as showing scarring from past encephalitis. Respondent's expert, Dr. Max Wiznitzer, argued the findings were normal developmental variants or artifacts, supported by medical literature. Special Master Hastings found Dr. Wiznitzer's interpretation more persuasive on all five alleged MRI abnormalities, concluding Petitioners failed to prove encephalitis. The Court of Federal Claims affirmed, deferring to the Special Master's credibility findings and expert evaluation. Attorneys for Petitioners: Curtis R. Webb. Attorneys for Respondent: Voris E. Johnson, U.S. Department of Justice. Special Master: George L. Hastings, Jr. Judge: Nancy B. Firestone. Decision Date: January 20, 2015 (Special Master), August 19, 2015 (Court of Federal Claims).

Public staged source text:

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DOCUMENT 1: USCOURTS-cofc-1_07-vv-00810-0
Date issued/filed: 2015-02-18
Pages: 26
Docket text: PUBLIC DECISION (Originally filed: 01/20/2015) regarding 100 DECISION of Special Master. Signed by Special Master George L. Hastings. (tpj) Copy to parties.
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Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 1 of 26
In the United States Court of Federal Claims
OFFICE OF SPECIAL MASTERS
No. 07-0810V
(Not for publication)
* * * * * * * * * * * * * * * * * * * * * * * * *
PETER and CHERIE NUTTALL, as the *
legal representatives of their minor son, *
N.N., *
*
Petitioners, * Filed: January 20, 2015
*
v. *
*
SECRETARY OF HEALTH AND * Vaccine Act Entitlement;
HUMAN SERVICES * Table Injury; MMR, DTaP/
* Encephalitis.
*
Respondent. *
*
* * * * * * * * * * * * * * * * * * * * * * * * *
Curtis R. Webb, Twin Falls, ID, for Petitioners.
Voris E. Johnson, U.S. Department of Justice, Washington, DC, for Respondent.
DECISION
HASTINGS, Special Master
This is an action in which Petitioners, Peter and Cherie Nuttall, seek an award under the
National Vaccine Injury Compensation Program (hereinafter “the Program1), on account of their
son N.N.’s severe neurologic disorder, which they believe was caused by “encephalitis”
triggered by either a measles, mumps, rubella (“MMR”) vaccination or a diphtheria-tetanus-
acellular pertussis (“DTaP”) vaccination, each administered to their son on November 22, 2004.
For the reasons set forth below, I conclude that Petitioners are not entitled to an award.
I
THE APPLICABLE STATUTORY SCHEME
Under the National Vaccine Injury Compensation Program, compensation awards are
made to individuals who have suffered injuries after receiving vaccines. In general, to gain an
1 The applicable statutory provisions defining the Program are found at 42 U.S.C. § 300aa-10 et seq. (2006 ed.).
Hereinafter, for ease of citation, all "§" references will be to 42 U.S.C. (2006 ed.).
1

Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 2 of 26
award, a petitioner must make a number of factual demonstrations, including showing that an
individual received a vaccination covered by the statute; received it in the United States; suffered
a serious, long-standing injury; and has received no previous award or settlement on account of
the injury. Finally – and the key question in most cases under the Program – the petitioner must
also establish a causal link between the vaccination and the injury. In some cases, such as the
present one, the petitioner may seek simply to demonstrate the occurrence of what has been
called a “Table Injury.” That is, it may be shown that the vaccine recipient suffered an injury of
the type enumerated in the “Vaccine Injury Table,” corresponding to the vaccination in question,
within an applicable time period following the vaccination also specified in the Table. If so, the
Table Injury is presumed to have been caused by the vaccination, and the petitioner is
automatically entitled to compensation, unless it is affirmatively shown by the Respondent that
the injury was caused by some factor other than the vaccination. (§ 300aa-13(a)(1)(A); § 300 aa-
11(c)(1)(C)(i); § 300aa-14(a); § 300aa-13(a)(1)(B).)
As relevant here, the applicable Vaccine Injury Table lists “encephalitis” as a
compensable injury, if the first symptoms thereof occur within 5 to 15 days of a measles, mumps
and rubella (“MMR”) vaccination, or within 72 hours of a diphtheria-tetanus-acellular pertussis
(“DTaP”) vaccination. (§ 300aa-14(a), as amended by 42 CFR § 100.3.)
Alternatively, if no injury falling within the Table can be shown, the petitioner may gain
an award by instead showing that the vaccine recipient’s injury or death was caused by the
vaccination in question.2 (§ 300aa-13(a)(1)(A); § 300aa-11(c)(1)(C)(ii).)
II
THE OMNIBUS AUTISM PROCEEDING (“OAP”)
A. General
This case is one of more than 5,400 cases filed under the Program in which petitioners
alleged that conditions known as “autism” or “autism spectrum disorders” [“ASD”] were caused
by one or more vaccinations. A special proceeding known as the Omnibus Autism Proceeding
(“OAP”) was developed to manage these cases within the Office of Special Masters (“OSM”). A
detailed history of the controversy regarding vaccines and autism, along with a history of the
development of the OAP, was set forth in the six entitlement decisions issued by three special
masters as “test cases” for two theories of causation litigated in the OAP (see cases cited below),
and will only be summarized here.
A group called the Petitioners’ Steering Committee was formed in 2002 by the many
attorneys who represented Vaccine Act petitioners who raised autism-related claims. Their
responsibility was to develop any available evidence indicating that vaccines could contribute to
2 In this case Petitioners have opted not to pursue this alternative “cause-in-fact” method of demonstrating causation.
Petitioners indicated at the expert hearing that they were not attempting to prove, and were thereby waiving, any
“off-Table” injury claim. (Tr. 8.) I note, however, that even if this case were evaluated under a cause-in-fact
analysis, for the reasons discussed in Section VIII of this decision, the outcome would be the same.
2

Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 3 of 26
causing autism, and eventually present that evidence in a series of “test cases,” exploring the
issue of whether vaccines could cause autism, and, if so, in what circumstances. Ultimately, the
PSC selected a group of attorneys to present evidence in two different groups of “test cases”
during many weeks of trial in 2007 and 2008. In the six test cases, the PSC presented two
separate theories on the causation of ASDs. The first theory alleged that the measles portion of
the measles, mumps, rubella (MMR) vaccine could cause ASDs. The second theory alleged that
the mercury contained in thimerosal-containing vaccines could directly affect an infant’s brain,
thereby substantially contributing to the causation of ASD.
Decisions in each of the three test cases pertaining to the PSC’s first theory rejected the
petitioners’ causation theories. Cedillo v. HHS, No. 98-916V, 2009 WL 331968 (Fed. Cl. Spec.
Mstr. Feb. 12, 2009), aff’d, 89 Fed. Cl. 158 (2009), aff’d, 617 F.3d 1328 (Fed. Cir. 2010);
Hazlehurst v. HHS, No. 03-654V, 2009 WL 332306 (Fed. Cl. Spec. Mstr. Feb. 12, 2009), aff’d
88 Fed. Cl. 473 (2009), aff’d, 604 F.3d 1343 (Fed. Cir. 2010); Synder v. HHS, No. 01-162V,
2009 WL 332044 (Fed. Cl. Spec. Mstr. Feb. 12, 2009), aff’d, 88 Fed. Cl. 706 (2009).3 Decisions
in each of the three “test cases” pertaining to the PSC’s second theory also rejected the
petitioners’ causation theories, and the petitioners in each of those three cases chose not to
appeal. Dwyer v. HHS, No. 03-1202V, 2010 WL 892250 (Fed. Cl. Spec. Mstr. Mar. 12, 2010);
King v. HHS, No. 03-584V, 2010 WL 892296 (Fed. Cl. Spec. Mstr. Mar 12, 2010); Mead v.
HHS, No. 03-215V, 2010 WL 892248 (Fed. Cl. Spec. Mstr. Mar. 12, 2010).
Thus, the proceedings in the six “test cases” concluded in 2010. Thereafter, the
Petitioners in this case, and the petitioners in other cases within the OAP, were instructed to
decide how to proceed with their own claims. The vast majority of those autism petitioners
elected either to withdraw their claims or, more commonly, to request that the special master
presiding over their case decide their case on the written record, uniformly resulting in a decision
rejecting the petitioner’s claim for lack of support. However, a small minority of the autism
petitioners have elected to continue to pursue their cases, seeking other causation theories and/or
other expert witnesses. A few such cases have gone to trial before a special master, and in the
cases of this type decided thus far, all have resulted in rejection of petitioners’ claims that
vaccines played a role in causing their child’s autism. In none of the post-test case rulings has a
special master or judge found any merit in an allegation that any vaccine can contribute to
causing autism.
B. Relevance of OAP to this case
This case, however, is quite different from the cases cited in Section II(A) of this
Decision. The issue here is not whether vaccines caused N.N.’s severe neurological disorder,
which has been characterized as a form of autism. In this case, as noted above, the question is
whether N.N. suffered a Table Injury, namely “encephalitis,” with the first symptoms of that
encephalitis occurring within a Table time period after vaccination. I ultimately conclude below
that N.N. did not suffer an “encephalitis” at all, so that he did not suffer a Table Encephalitis.
But it should be stressed that the evidence upon which I have relied in making my decision is
limited to the evidence set forth in this case, on the issue of whether N.N.’s MRIs show the
existence of a previous encephalitis. I include this description of the OAP only to show why this
3 The petitioners in Snyder did not appeal the decision of the U.S. Court of Federal Claims.
3

Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 4 of 26
case, filed in 2007, was not processed in the usual manner of non-autism Program cases.
Because this case involved a child who had been diagnosed with a form of autism, the processing
of this case was delayed, at Petitioners’ request, along with the other 5,000 autism cases, to await
the final outcome of the autism “test cases”. When Petitioners filed this case in 2007, it should
be noted, they entitled their petition “Petition for Vaccine Compensation--Omnibus Autism
Proceeding--MMR Vaccine Causation” (Pet. filed Nov. 19, 2007, p. 1). Their petition did not
allege a Table Injury at all, but alleged that N.N.’s autism was vaccine-caused. Then, when the
“test cases” were finalized in 2010, individual petitioners such as the Nuttals were given a
generous period of time to decide whether to abandon their claims or to develop a theory of their
own case.4
Only after Petitioners filed their Amended Petition on November 28, 2011, did the focus
of this case change to a Table Injury, namely an alleged Table Injury Encephalitis associated
with N.N.’s vaccinations of November 22, 2004.
Thus, the sole issue that I address in this case does not concern whether autism can be
caused by the vaccination that N.N. received, but only whether N.N. suffered an encephalitis,
with the first symptoms of that encephalitis arising within a Table time period after his
vaccinations.
III
FACTS AND PROCEDURAL HISTORY OF THIS CASE
A. Facts appearing in medical records
N.N. was born on September 11, 2000. (Ex. 3, p. 27.)5 He was delivered via caesarean
section, weighing 8 pounds at birth. (Id.)
Between September 22, 2000, and June 27, 2003, N.N. was seen by Dr. John Wynn, a
pediatrician, for well-child visits and a variety of ailments, including cough, nasal congestion,
runny nose, wheezing, ear pain, loose stool, diarrhea, rash, eczema, fever, bronchiolitis, otitis
media, atopic dermatitis, rhinitis, concern that he might be hyperactive, concern that he was not
sleeping or eating well, and upper respiratory infections. (Ex. 2, pp. 1-13.) Dr. Wynn also saw
N.N. on February 7, 2001, for possible seizure activity while he was falling asleep. (Ex. 2, p. 7.)
Dr. Wynn’s impression was “probable mild clonic jerking with transition to sleep phase.” (Id.)
As a result of the family’s move from Salt Lake City to Las Vegas, N.N. began seeing a
new pediatrician, Dr. Ivana Winkler. N.N. saw Dr. Winkler on November 5, 2004, with
complaints of a sore throat, runny nose, sneezing, low fever, cough and decreased appetite. (Ex.
4 Thus, after the initially assigned special master, Special Master Moran, decided an initial factual issue in his
Findings of Fact filed on March 6, 2009, the case was then reassigned to Special Master Campbell-Smith, because
she was one of the three special masters handling the autism cases.
5 Exhibits filed by Petitioners are identified by number, while exhibits filed by Respondent are identified by letter.
In addition, certain exhibits presented for the first time at the expert hearing in this case – referred to as “trial
exhibits” – are also identified by number.
4

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3, p. 1.) Dr. Winkler diagnosed N.N. as having, among other conditions, an upper respiratory
infection. (Id.)
On November 22, 2004, N.N. saw Dr. Winkler for a well-child visit. (Ex. 3, p. 2.) At
this visit, N.N. received DTaP and MMR vaccinations, as well as an inactivated poliovirus
vaccination (“IPV”). (Id.) There is no evidence in the contemporaneous medical records
indicating that N.N. had an adverse reaction to these vaccines, or that medical attention was
sought in the weeks following the vaccinations.
N.N. continued to see Dr. Winkler for ailments during January of 2005. (Ex. 3, pp. 3-5.)
He was diagnosed with an upper respiratory infection and prescribed amoxicillin on January 11,
2005. (Ex. 3, p. 4.)
On March 1, 2005, N.N. saw Dr. Winkler for complaints including frequent urination,
loss of appetite, lethargy, watery diarrhea, and a concern about a habit of holding his jaw. (Ex. 3,
p. 6.) N.N. saw Dr. Winkler again on May 26, 2005, for complaints of lethargy, loss of appetite,
sneezing, and sniffling. (Id. at 7) At this visit, it was noted that N.N. was exhibiting head-
banging episodes, and that he experienced mood-swings and self-biting. (Id.)
On June 14, 2005, Dr. Winkler saw N.N. for complaints of regression and lack of speech.
(Ex. 3, p. 8.) A history taken at that visit indicates that N.N. “used to go weeks without saying
much,” “never talked like a normal kid,” and “wasn’t communicating normally earlier but [was]
much worse [during the] last two weeks.” (Id.) Dr. Winkler diagnosed N.N. with speech and
developmental delay with acute regression, and indicated the possibility of an ASD. (Id.)
On June 8, 2005, and June 15, 2005, N.N. was seen by Dr. Joan Carapucci, a child
psychiatrist, for an evaluation of possible bipolar disorder. (Ex. 5, p. 6.) Dr. Carapucci
concluded that N.N. “certainly meets the criteria for Autism Spectrum Disorder.” (Id., p. 5.)
Dr. Carapucci diagnosed N.N. with Childhood Disintegrative Disorder (“CDD”), a form of
autism, and recommended a referral to a neurologist. (Id.)
On June 24, 2005, N.N. was seen by Dr. Winkler for a follow-up regarding his lab work.
(Ex. 3, p. 9.) Notes from that visit indicate that N.N. made minimal eye contact and talked little.
(Id.) His family history was noted to include a maternal cousin with autism. (Id.) Dr. Winkler
referred N.N. for audiology and neurology consultations. (Id.)
A CT scan of N.N.’s brain performed on July 18, 2005, was interpreted as normal. (Ex.
6, p. 11.)
On August 16, 2005, Dr. Alfreda Maller, a neurologist, evaluated N.N. for global
developmental regression. (Ex. 6, p. 1.) Dr. Maller’s impression was that N.N. had “severe
developmental regression, highly consistent with childhood disintegrative disorder.” (Ex. 6, p.
2.) Dr. Maller ordered an EEG and a metabolic work-up. (Id.)
On September 1, 2005, N.N. was seen by Dr. Howard Baron, a gastroenterologist, for
regressive behavior and large, foul-smelling stools. (Ex. 7, p. 1.) Dr. Baron noted that “the
mother recalls that [N.N.] was nearly potty trained prior to his regressive symptoms,” but that he
had reverted to being diapered. (Id., p. 1-2.) Dr. Baron indicated that N.N. might have a central
5

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nervous system disorder or metabolic disorder. (Id., pp. 4-5.) He recommended metabolic and
chemistry panels. (Id. at 4.)
On November 9, 2005, an MRI study was conducted. (Ex. 6, p. 25.) It was interpreted as
normal by Dr. Brett Hewell on December 19, 2005. (Id.)
From that point forward, N.N. visited multiple specialists, including a geneticist (Ex. 12,
p. 1), an autism clinic (Ex. 13, p. 1), and an adolescent psychiatrist (Ex. 15, p. 3). At various
points he was prescribed Seroquel (Ex. 14, p. 1) and Depakote (Ex. 14, p. 8), as well as Adderall,
Risperdal and Clonidine (Ex. 15, p. 3). He had multiple diagnoses in addition to the previously
diagnosed CDD, including “child psychosis” (Ex. 11, p. 11), mental retardation (Ex. 13, p. 3),
ADD (Ex. 14, pp. 8-9), and cognitive disorder – not otherwise specified (“NOS”) (Id.). He was
hospitalized for self-injurious behavior from August 12, 2006, to August 18, 2006. (Ex. 14, pp.
1-3.) A second CT scan was conducted on August 3, 2009. (Ex. 40.) Like his 2005 CT scan, it
was read as normal. (Id.)
At some point, N.N.’s family moved to Georgia and he began seeing Dr. Asma Fischer.
(Ex. 23, p. 1.) N.N. was referred to Dr. Fischer by Dr. Shuman, Petitioners’ expert in this case.
(Id.) On September 27, 2011, Dr. Fischer recorded an impression including “encephalopathy
status post MMR,” and scheduled an MRI for the following month. (Id., p. 2.) Dr. Fischer’s
September 27 record indicates that petitioners’ expert in this case, Dr. Shuman, had been in
contact with her and advised her that a previous MRI “revealed abnormalities.”6 (Id., p. 1.)
Ultimately, a second MRI study was conducted on October 24, 2011, and interpreted by
Dr. Jose Bauza. (Ex. 25, p. 1.) Dr. Bauza reported bilateral hyperintensities within the
hippocampus and the fornices. (Id.) His report indicated that “the findings described for the
hippocampal is in keeping with the patient’s history of previous encephalitis, as well as the
hyperintensity within the petrigonal region.” (Id.) Dr. Fischer took note of Dr. Bauza’s report
on October 25, 2011, and included “post limbic encephalitis” to her “impression” of N.N.’s case
for the first time. (Ex. 23, p. 3.)
B. Procedural history
On November 19, 2007, Mr. and Mrs. Nuttall filed a petition on behalf of their minor
son, N.N., under the Vaccine Act. (§§ 300aa-1 to 300aa-34.) The petition, accompanied by
medical records, affidavits, and photographs marked as Exhibits 1 to 16, alleged that N.N.
developed Child Disintegrative Disorder caused by his MMR vaccination on November 22,
2004. (Pet. at ¶¶ 2-4.) After reviewing the petition and accompanying documents,
representatives of the Secretary of the Health and Human Services (“HHS”) concluded that this
case was not appropriate for compensation under the Vaccine Act, issuing a “Rule 4 report” on
February 27, 2008. (ECF No. 6.)
A fact hearing was held by Special Master Christian Moran on June 24, 2008, in Las
Vegas, Nevada. (ECF No. 17.) The purpose of the hearing was to resolve factual disputes
regarding the onset of N.N.’s condition in light of conflicts between the medical records and
Petitioners’ claims. Several witnesses testified, including N.N.’s parents, two grandparents, and
6 Based on the record of this case, it appears that the only previous MRI was the study of November 9, 2005,
interpreted by Dr. Hewell as normal.
6

Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 7 of 26
a babysitter. (ECF No. 24, pp. 1-5.) On March 6, 2009, Special Master Moran issued a
document entitled Unpublished Findings of Fact, resolving the inconsistencies and addressing
the timing and nature of N.N.’s regression relative to his vaccinations of November 22, 2004.
(ECF No. 24.) Special Master Moran’s findings of fact answered a series of seven specific
questions posed by the parties. (ECF No. 24, p. 2.)
Special Master Moran’s fact findings concluded that certain of N.N.’s symptoms, though
not mentioned in the contemporary medical records, did arise for the first time in the time period
following soon after his vaccinations of November 22, 2004. In particular, Special Master
Moran found that N.N.’s “ability to use language started to decrease in November 2004.”
(Findings, p. 7), and that his loss of speech skills also began in November 2004 (id. at 8).
Special Master Moran also found that N.N. “experienced an episode of separation anxiety” on
November 30, 2004. (Id. at 8.)
Subsequently, the case was stayed pending the outcome of the Omnibus Autism
Proceeding (“OAP”) “test cases” addressing the theory that the MMR vaccination can contribute
to causing autism. (ECF No. 25.) On November 7, 2011, the case was reassigned to Chief
Special Master Patricia Campbell-Smith (ECF No. 41), one of the three special masters handling
the autism cases (the undersigned and Special Master Vowell were the other two), and
Petitioners filed an amended petition on November 28, 2011 (ECF No. 45). The amended
petition alleged that N.N.’s CDD was a result (“sequela”) of an encephalitis, a Table Injury,
attributable to his November 22, 2004, MMR vaccine. (ECF No. 45, ¶ 11.)
Petitioners’ and Respondent’s expert reports were filed on December 8, 2011, and April
23, 2012, respectively (Ex 26; Ex A), and the parties submitted briefing regarding the standard to
be applied in terms of what constitutes proof of an “encephalitis” for purposes of demonstrating
a Table Injury under the Vaccine Act. (ECF Nos. 58, 61, and 62.) Special Master Campbell-
Smith issued a pre-hearing ruling regarding, inter alia, the definition of “encephalitis” for
Program purposes on January 18, 2013. (ECF No. 66.)
The expert hearing was conducted on January 25, 2013, at the Office of Special Masters
in Washington, D.C, with testimony from Drs. Shuman and Wiznitzer. (See Transcript of
Proceedings, ECF No. 71 (“Tr.”).) Following a post-hearing status conference, Special Master
Campbell-Smith issued an order on February 11, 2013, addressing objections raised at the
hearing, regarding the timeliness and clarity of exhibits presented by Respondent’s expert at the
hearing, and setting a schedule for the filing of annotated exhibits and a rebuttal report from
Petitioners’ expert. (ECF No. 67.)
The case was reassigned to me on March 8, 2013 (ECF No. 72),7 after which I issued an
order instructing the parties to adhere to the filing schedule set forth in the post-hearing order of
Special Master Campbell-Smith (ECF No. 73.) Ultimately, annotated trial exhibits were filed on
April 12, 2013 (ECF No. 79), and Petitioners’ rebuttal expert report (Ex. 49) was filed on May
17, 2003 (ECF No. 84).
7 This reassignment resulted from the fact that Special Master Campbell-Smith had been nominated by the President
to become a Judge of this Court. She subsequently, after being confirmed by the U.S. Senate, became a Judge of
this Court, and later became Chief Judge of this Court.
7

Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 8 of 26
Petitioners’ initial post-hearing brief was filed on August 8, 2013. (ECF No. 92.) A
responsive brief was filed by Respondent on September 27, 2013 (ECF No. 93), and a reply brief
by Petitioners was filed on October 15, 2013 (ECF No. 94).
IV
ISSUE TO BE DECIDED
In this case, Petitioners seek a Program award, contending that the severe neurologic
disorder from which N.N. suffers was caused by a “Table Injury Encephalitis” resulting from
either the MMR or DTaP vaccinations administered on November 22, 2004. Specifically,
Petitioners contend that N.N.’s disorder was caused by “limbic encephalitis,” the first symptoms
of which took place shortly after those vaccinations. Petitioners seek to prove that N.N.
experienced “encephalitis” after his vaccinations on November 22, 2004, and that the onset of
that injury falls within the timeframes set forth in the Vaccine Injury Table. They are relying
exclusively on the Table Injury presumption of causation, and are not attempting to establish a
“cause-in-fact” basis linking N.N.’s injury to his vaccinations. (See footnote 2, above.)
Respondent contends that N.N. suffers from CDD unrelated to his vaccinations.
Respondent’s expert argues that N.N. did not suffer encephalitis. Respondent argues that N.N.’s
MRI scans are devoid of proof that N.N. suffers from limbic encephalitis, and that he is missing
certain key symptoms of encephalitis.
After careful consideration, I find, for all the reasons discussed below, that Petitioners
have failed to meet their burden. Although I accept Special Master Moran’s findings concerning
the onset of certain symptoms in N.N. soon after the vaccinations of November 22, 2004, I find
that Petitioners have failed to establish by preponderant evidence that what N.N. experienced at
that time was, in fact, a “Table Encephalitis.”8
V
SUMMARY OF EXPERT WITNESSES’ QUALIFICATIONS AND OPINIONS
In this case, each side relies upon the expert reports and hearing testimony of one medical
expert. At this point, I will briefly summarize both the qualifications and the opinions of those
expert witnesses.
A. Petitioners’ expert, Dr. Robert M. Shuman
1. Qualifications
Petitioners rely primarily on the expert reports and testimony of Dr. Robert M. Shuman.
Dr. Shuman studied experimental psychology at Cornell University from 1959 to 1963 before
attending Stanford Medical School from 1964 to 1968. (Ex. 27, p. 1.) From 1969 to 1970 he
completed a residency in pediatrics at the University of Colorado Medical Center. (Id.) He later
8 Petitioners have the burden of demonstrating the facts necessary to show entitlement to an award by a
“preponderance of the evidence.” § 300aa-12(a)(1)(A). Under that standard, the existence of a fact must be shown
to be “more probable than its nonexistence.” In re Winship, 397 U.S. 358, 371 (1970) (Harlan, J., concurring).
8

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completed a residency in pathology at the University of Washington from 1970 to 1972. (Id.) He
is licensed to practice medicine in several states, and has been Board-certified in neurology and
neuropathology. (Ex. 27, p. 2.) He has also been certified by the American Society of
Neuroimaging. (Id.)
Dr. Shuman was an instructor in neuropathology for the University of Washington from
1974 to 1975. (Id., p. 1) He was an assistant professor of Neuropathology at the University of
Pittsburgh School of Medicine from 1975 to 1976, and a professor of Neurology and Pathology
at the University of Nebraska from 1977 to 1983. (Id.) From 1985 to 1988 he served as Vice
Chairman of the department of Pathology at the University of Oklahoma, and later as Interim
Chairman of Neurology there from 1989 to 1990. (Id.) In 1991 he left academia to set up a
private practice in pediatric neurology, which he maintained until retiring in 2006. (Tr. 16-17.)
Since that time he has served as a legal consultant. (Tr. 17.)
Dr. Shuman lists numerous grants and awards on his curriculum vitae. (Ex. 27, pp. 2-3.)
In addition, he lists many publications, including 49 journal articles, two textbooks, and 38
abstracts. (Ex. 27, pp. 6-11.) He has also held editorial positions with the Journal of Child
Neurology. (Id., p. 5.)
2. Summary of Dr. Shuman’s opinion
Dr. Shuman’s report in this case indicates that he believes that N.N.’s MMR vaccination
of November 22, 2004, caused him to suffer a viral encephalitis that damaged the limbic system
of his brain.9 Dr. Shuman interprets both N.N.’s 2005 and 2011 MRIs as abnormal, and argues
that they demonstrate a pattern of abnormalities consistent with scarring from past encephalitis.
(Ex. 26, p. 7.) (These alleged abnormalities are discussed in detail in Section VIII below.) Dr.
Shuman asserts that N.N.’s neurologic damage in the limbic system correlates to his regression
and behavior problems. (Id., pp. 8-9.) He contends that the pattern of limbic encephalitis is
“consistent with the literature description of Measles Encephalitis in the wild.” (Id., p. 7.) At the
hearing in this case, Dr. Shuman acknowledged that absent evidence that N.N. had received an
MMR vaccine, he would agree that N.N.’s clinical course could be considered consistent with
the onset of CDD. (Tr. 125.) He also indicated that he could not offer an opinion that N.N.
experienced encephalitis absent evidence of abnormality in N.N.’s MRI scans. (Tr. 109.)
B. Respondent’s expert, Dr. Max Wiznitzer
1. Qualifications
Respondent relies on the expert reports and testimony of Dr. Max Wiznitzer. Dr.
Wiznitzer attended the Northwestern University Honors Program and specialized in Medical
Education, earning a Bachelor of Science degree in Medicine in 1975 before entering medical
school. (Ex. B, p. 1.) He attended Northwestern University Medical School and graduated in
1977 with a degree in medicine. (Id.) During his postgraduate training, Dr. Wiznitzer was a
resident in pediatrics at the Children’s Hospital Medical Center in Cincinnati, Ohio, from 1977
to1980. (Id.) He also was a fellow in developmental disorders at the Cincinnati Center for
9 Although Petitioners also assert involvement of N.N.’s DTaP vaccination of the same date, Dr. Shuman opined that
he did not believe that the DTaP vaccination contributed to N.N.’s condition. (Tr. 264.)
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Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 10 of 26
Developmental Disorders from 1980 to 1981. (Id.) He thereafter became a fellow in pediatric
neurology at the Children’s Hospital of Pediatric Neurology from 1981 to 1984. (Id.) He
received the NIH National Research Service Award fellowship in Higher Cortical Functions
from 1984 to1986. (Id., p. 2.) From 1986 to the present, Dr. Wiznitzer has served as an
Assistant Professor of Pediatrics, Neurology, and International Health at Case Western Reserve
University. (Ex. B, p. 2; Tr. 132.)
Dr. Wiznitzer has additionally won the NIH National Research Service Award from
the Albert Einstein College of Medicine in 1986, and was recognized as the Professional of the
Year from the Autism Society of Ohio in 1991. (Ex. B, p.4.) He was certified by the American
Board of Pediatrics in 1982, the American Board of Psychiatry and Neurology in Child
Neurology in 1986, and the National Board of Medical Examiners in 1978. (Ex. B, p. 5; Tr.
134.) He has been licensed to practice in three states. (Ex. B, p. 5.) Dr. Wiznitzer served on the
Editorial Board of many journals, including Pediatric Neurology, Journal of Child Neurology,
and Lancet Neurology. (Id., p. 6.) He has helped author 47 original articles, 9 book chapters,
and 52 abstracts, which are listed on his CV. (Id., pp. 12-22.)
2. Summary of Dr. Wiznitzer’s opinion
Dr. Wiznitzer believes that N.N.’s clinical course is consistent with CDD, and argues that
neither N.N.’s MRIs nor his clinical symptoms indicates that N.N. suffered from encephalitis.
(Ex. A, pp. 4-5; Tr. 161.) Dr. Wiznitzer stresses that individuals who suffer an episode of
encephalitis have a significant change in mental status such as lethargy, stupor, or coma, as well
as movement disorders, symptoms which he argues are absent in N.N.’s case. (Ex. A, p. 5; Tr.
161.) Dr. Wiznitzer also disagrees with Dr. Shuman’s interpretation of N.N.’s 2005 and 2011
MRIs, arguing that both show a normal brain. (Ex. A, p. 4; Tr. 169.) Thus, he concludes that
N.N.’s condition is a typical case of CDD, rather than a result of encephalitis. (Ex. A, p. 4; Tr.
215.)
VI
SUMMARY OF MY OPINON
In this case, the first major factor is that, like Chief Special Master Campbell-Smith, I
conclude that it is only fair that I accept the factual findings made by Special Master Moran. I
accept those findings as accurate.
Further, when instructed to accept those findings as accurate, both testifying experts
testified that N.N.’s clinical course is at least generally consistent with either a finding of limbic
encephalitis as Petitioners contend, or with an ordinary course of CDD, as respondent contends.
(Ex. A, p. 4; Tr. 125.)
Therefore, I conclude that if Petitioners were able to show, by analysis of the MRIs, that
N.N. did suffer an “encephalitis” sometime in the past, then I would find that the November
2004 symptoms did constitute the first symptoms of that encephalitis, and that those first
symptoms likely appeared either within 72 hours of N.N.’s DTaP vaccination of November 22,
2004, or within 5 to 15 days after N.N.’s MMR vaccination of that same date. Thus, if the MRI
analysis were favorable to Petitioners, I would find that N.N. suffered a Table Injury
Encephalitis.
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Accordingly, the outcome of this case boils down to which party’s interpretation of the
MRI results is more persuasive.
For the reasons set forth below in part VIII of this Decision, I found the testimony of Dr.
Wiznitzer concerning the MRIs to be substantially more persuasive than that of Dr. Shuman, and
thus I conclude that Petitioners have failed to show that it is “more probable than not” that N.N.
suffered from a limbic encephalitis, or any encephalitis. I will set forth my detailed analysis
concerning the MRIs below.
VII
LEGAL STANDARD: “TABLE ENCEPHALITIS”
For petitions, such as this one, filed since March 24, 1997, “encephalitis” exists as a
Table Injury for MMR and DTaP vaccinations. I will set forth the relevant Table Injury sections
below.10
§ 100.3 Vaccine injury table.
(a) In accordance with section 312(b) of the National Childhood Vaccine
Injury Act of 1986, * * * the following is a table of vaccines, the injuries,
disabilities, illnesses, conditions, and deaths resulting from the administration of
such vaccines, and the time period in which the first symptom or manifestation of
onset or of the significant aggravation of such injuries, disabilities, illnesses,
conditions, and deaths is to occur after vaccine administration for purposes of
receiving compensation under the program:
VACCINE INJURY TABLE
Vaccine Illness, disability, Time period for first symptom or
injury or condition manifestion of onset or of
covered significant aggravation after
vaccine administration
* * *
I. Vaccines containing A. Anaphylaxis or 4 hours
whole cell pertussis anaphylactic shock
bacteria, extracted or B. Encephalopathy 72 hours
partial cell pertussis (or encephalitis)
10 The statute itself contains a version of the Vaccine Injury Table that applied to vaccinations administered prior to
the enactment of the Program and for several years after that enactment. See § 300aa-14(a). However, the Vaccine
Injury Table was administratively modified with respect to Program petitions, such as this one, that were filed after
March 24, 1997. See 62 Fed. Reg. 7685, 7688 (1997); O’Connell v. Shalala, 79 F.3d 170 (1st Cir. 1996). That
Table modification, along with an earlier administrative modification of the Table in 1995 (see 60 Fed. Reg. 7678
(1995)), significantly altered the “Table Injury” categories with respect to the MMR and DTaP vaccinations from
the version of the Table contained in the statute. The portion of the new Table applicable to this case, listing
“encephalitis” as a Table Injury for the MMR and DTaP vaccinations, appears at 42 C.F.R. § 100.3(a)(II)(B) and
(III)(B) (10-1-97 edition of C.F.R.--all C.F.R. references in this Decision will be to the 10-1-97 edition of the
C.F.R.).
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Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 12 of 26
bacteria, or specific C. Any acute Not Applicable
pertussis antigens (e.g., complication or
DTP, DTaP, P, DTP- sequela (including
Hib) death) of an illness,
disability, injury,
or condition
referred to above
which illness,
disability, injury,
or condition arose
within the time
period prescribed
* * *
III. Measles, mumps, A. Anaphylaxis or 4 hours
rubella, or any of its anaphylactic shock
components (e.g., B. Encephalopathy 5-15 days (not less than 5 days
MMR, MR, M, R) (or encephalitis) and not more than 15 days.)
C. Any acute Not applicable
complication or
sequela (including
death) of an illness,
disability, injury,
or condition
referred to above
which illness,
disability, injury,
or condition arose
within the time
period prescribed
* * *
Thus, as described above, this decision addresses Petitioners’ “Table Injury” claim
alleging that N.N. suffered an “encephalitis” corresponding either to his MMR or DTaP
vaccinations of November 22, 2004. As indicated in the chart, the applicable Vaccine Injury
Table lists “encephalopathy (or encephalitis)” as a compensable injury if the first symptoms
thereof occurred within 5 to 15 days after an MMR vaccination, or within 72 hours of a DTaP
vaccination. (§ 300aa-14(a), as amended by 42 CFR § 100.3.) This simplifies Petitioners’
burden in that they have the benefit of a presumption of causation. That is, as described in
Section I above, if Petitioners demonstrated that it was more likely than not that N.N.
experienced the first symptoms of an encephalitis within 72 hours of receiving his DTaP
vaccination, or within 5 to 15 days after receiving his MMR vaccination, his encephalitis would
be a Table Injury, presumed to have been caused by the vaccination, and the Petitioners would
automatically be entitled to compensation for any complication of that encephalitis (unless it was
affirmatively shown by the Respondent that the encephalitis was caused by some factor other
than the vaccination.) (§ 300aa-13(a)(1)(A); § 300 aa-11(c)(1)(C)(i); § 300aa-14(a); § 300aa-
13(a)(1)(B).)
Of course, this still leaves open the question of what constitutes “encephalitis” for
Program purposes. In most instances, Table Injury cases are guided by the statutory or
12

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regulatory “Qualifications and aids in interpretation” (“QAI”), which provide more detailed
explanation of what should be considered when determining whether a vaccinee has actually
suffered an injury listed on the Vaccine Injury Table. (§300aa-14(b).) Significant to this case,
however, while “encephalopathy” is carefully and minutely defined in the QAI, “encephalitis” is
not. (Id.) The parties agree that, although the two terms are listed together on the table--i.e.
“encephalopathy (or encephalitis)”--they refer to two distinct conditions. (See ECF No. 58, p. 2;
ECF No. 61, p. 4.) The parties differ greatly, however, in their preferred definitions of
“encephalitis.” (Id.)
This issue was previously briefed before Special Master Campbell-Smith prior to the
expert hearing. (ECF Nos. 61 and 62.) Petitioners argued that “because the law governing the
Program does not define encephalitis, you should use ‘the common, ordinary, and accepted
meaning’ of encephalitis.” (ECF No. 61, p. 5.) Citing to Taber’s Cyclopedic Medical
Dictionary, Petitioners then urged that encephalitis is simply “inflammation of the brain.” (Id.)
Respondent, on the other hand, argued that the court should apply Respondent’s own draft
proposal for a revision to the QAI, setting forth detailed criteria for demonstrating encephalitis.
(ECF No. 62, pp. 2-5.) Significantly, Respondent admitted that, far from being a binding
addition to the QAI, the draft was only an anticipated proposal, and, “at this time, respondent
does not know when a new version of the QAI will be proposed through rulemaking.” (Id.)
Special Master Campbell-Smith concluded that although Petitioners’ definition was
accurate, it was “too broad for Program purposes.” (ECF No. 66, p. 1.) The Special Master also
declined to adopt Respondent’s proposed criteria “because the proposed definition of
encephalitis is not yet part of the QAI.” (Id.) Rather, Special Master Campbell-Smith ruled that
“among the factors to be considered are: (1) whether [N.N.] in fact did experience demonstrable
brain inflammation, (2) whether the impact of the claimed inflammation on [N.N.]’s brain was
severe enough to result in the injuries he experienced, (3) whether the location of the
inflammation in [N.N.]’s brain could have caused the symptoms he experienced, and (4) whether
there is evidence of the appropriate temporal relationship between the onset of [N.N]’s
inflammation and his vaccinations.” (Id., p. 2.)
First, I agree with Petitioners’ contention that, according to principles of statutory
construction, the appropriate definition to use in this context is the “common, ordinary, and
accepted meaning.” (See, e.g., Waddell v. HHS, No. 10-316V, 2012 WL 4829291, at *8 (Fed.
Cl. Spec. Mstr. Sept. 19, 2012) (“In the absence of a specific indication to the contrary, words
used in the statute will be given their common, ordinary and accepted meaning, and the plain
language of the statute will be afforded its plain meaning.”).) This necessitates rejecting
Respondent’s proposed definition.
Citing “encephalopathy” as an example, Respondent argues that QAI criteria can be
narrower than the commonly accepted medical definition. (ECF No. 93, p. 6.) That is,
Respondent implicitly acknowledges that QAI definitions are not necessarily commonly used
definitions, but rather specialized for Program purposes. Yet, the Respondent also admits that
her proposed definition has not yet been vetted by the rulemaking process. (ECF No. 62, p. 2.)
Thus, Respondent’s proposed definition is neither the commonly used definition, nor a statutorily
prescribed definition. Obviously, if Respondent’s definition of encephalitis is ultimately adopted
as a result of the completed rulemaking process, then it will control in the future. In the
meantime, however, to apply Respondent’s anticipated proposal would be to preempt the
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rulemaking process, abrogate principles of statutory construction, and impermissibly heighten
the Petitioners’ burden.
Therefore, I accept Petitioners’ argument that an “encephalitis” is simply any
“inflammation of the brain.” However, that does not mean that the rest of Special Master
Campbell-Smith’s four-part discussion of “encephalitis” in this case is not important. The
Vaccine Injury Table, as set forth above, prescribes that “encephalitis” is a Table Injury and
therefore presumed to be vaccine-caused, and also that “any acute complication or sequela” of
the encephalitis is also presumed to be vaccine-caused. Thus, Special Master Campbell-Smith
was correct in stating that Petitioners would need to prove not only that N.N. (1) “in fact did
experience demonstrable brain inflammation,” but also must show “(2) whether the impact of the
claimed inflammation on [N.N.’s] brain was severe enough to result in the injuries he
experienced, [and] (3) whether the location of the inflammation in N.N.’s brain could have
caused the symptoms he experienced.” In other words, Special Master Campbell-Smith’s
Factors (2) and (3) are inherent in showing that N.N.’s conditions are an “acute complication or
sequela” of his encephalitis. And, of course, Special Master Campbell-Smith was correct that
Petitioners also need to demonstrate “(4) whether there is evidence of the appropriate temporal
relationship between the onset of N.N.’s inflammation and his vaccinations”--that is, that the first
symptoms of the inflammation arose within 72 hours of N.N.’s DTaP vaccination, or within 5 to
15 days after his MMR vaccination (both vaccinations occurred on November 22, 2004).
VIII
ANALYSIS OF MRI STUDIES
The correct interpretation of N.N.’s MRI studies is clearly the key issue in this case. That
is because, though the two experts in this case differ on the correct interpretation of N.N.’s MRI
images, both experts agree that N.N.’s clinical course is basically consistent with either limbic
encephalitis or Childhood Disintegrative Disorder (CDD). (Ex. A, p. 4; Tr. p. 125.) In fact, Dr.
Shuman acknowledged at the expert hearing that absent an abnormal finding in N.N.’s MRI, he
would not be able to opine that N.N. experienced encephalitis. (Tr. 109.) Thus, in her post-
hearing Order of February 11, 2013, Special Master Campbell-Smith characterized the
interpretation of N.N.’s MRI imaging as the “dispositive” issue in this case. (ECF No. 67, p. 2.)
I agree.
For the reasons discussed below, however, I find that Petitioners have failed to
demonstrate that N.N.’s MRI images show any abnormalities, and have therefore failed to carry
their burden concerning this key issue. Dr. Shuman presented a series of MRI images from two
MRI studies of N.N.’s brain alleging the presence of several different abnormalities indicative of
past inflammation. In each instance, I found Respondent’s interpretation of the MRI images
more persuasive.11
A. Dr. Wiznitzer’s MRI interpretation is more convincing than Dr. Shuman’s
11 Obviously, because I have found that Petitioners have failed to demonstrate that N.N. experienced any
inflammation of the brain at all, it is unnecessary to address prongs two and three of Special Master Campbell-
Smith’s test, which go to the location and severity of the inflammation. These prongs are mooted by my finding.
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Dr. Shuman opined that MRI studies conducted in November of 2005 and October of
2011 demonstrate that N.N. had scarring of the brain consistent with past encephalitis. During
the evidentiary hearing, Dr. Shuman walked the special master through eight MRI images from
these studies (Exs. 42-A through 45-B). (Tr. 33-77.) Dr. Shuman selected these eight images in
particular, because they are the “most illustrative” of the abnormalities he alleges to be present.
(Tr. 75-76.) Specifically, Dr. Shuman argued that Exhibits 42-A through 45-B show the
following abnormalities which evidence scarring of the brain consistent with past encephalitic
inflammation: Trigonal hyperintensities; hyperintensity of the hippocampi; hyperintensity of the
ventricle lining; enlarged ventricles; and hyperintensity of the fornices. Dr. Wiznitzer, however,
provided a contrary view on each of these five points. Dr. Shuman’s and Dr. Wiznitzer’s
arguments relative to each of these five alleged abnormalities are addressed in turn below.
1. Trigonal hyperintensities
Exhibits 42-A and 42-B are images of the same portion of the brain (described as the
“coronal cut”) from N.N.’s 2011 and 2005 MRI studies, respectively. Both of these images,
according to Dr. Shuman, show an abnormal brain, illustrating “linear radiant striped zones of T2
hyperintensity in the same region of the peritrigonal white matter.” (Tr. 48-49.) According to
Dr. Shuman, the white matter of the brain is represented on the MRI image as “black signal” and
therefore, normal myelination appears as black. (Tr. 45.) Describing Ex. 42-A from N.N.’s 2011
MRI, Dr. Shuman noted that “dense, black signal void, that is, normal white matter, in the deep
centrum semiovale, that is the core of the white matter, in the human cerebrum should be equally
black and it’s not. It’s Swiss cheese. It’s lighter than it ought to be, it has holes in it, it has lines
in it. It is rattled. It is damaged.” (Tr. 45.) In Dr. Shuman’s view, this represents old scarring
consistent with “an old, established inflammatory encephalitis.” (Tr. 46-47.)12
Dr. Wiznitzer, however, describing the same area that Dr. Shuman characterized as
“Swiss cheese,” observed that Exhibit 42-A shows “a band of normal myelinated white matter
sitting between these linear intensities, and the ventricle, the ventricular wall is basically
smooth.” (Tr. 208.) According to Dr. Wiznitzer, “bottom line, these are known as terminal zones,
a normal finding in individuals anywhere between 16 months up through the second decade of
life.” (Tr. 208-09.) Dr. Wiznitzer indicated that terminal zones are believed to be areas of
immature myelin, where vascular pathways are beginning to form and cerebrospinal fluid is
captured. (Tr. 209.) This, Dr. Wiznitzer explained, is why the hyperintensities appear as linear.
(Id.)
In support of his contention, Dr. Wiznitzer presented MRI images appearing in the
medical literature that are considered “normal” and which feature the type of linear
hyperintensities identified by Dr. Shuman as abnormal. (Tr. 209-11; Trial Ex. 4, Assessment of
Normal Myelination with Magnetic Resonance Imaging, p. 27, Figure B; Trial Ex. 5, Pediatric
Neuroimaging, Fourth Ed., p. 39, Figure C.)13 Dr. Wiznitzer also indicated that his opinion is
12 Ex. 42A is marked with black circles noting the location of the hyperintensity described by Dr. Shuman. (Tr. 33.)
13 At the hearing, Petitioners raised an objection to the quality of the copies being presented by Dr. Wiznitzer.
Special Master Campbell-Smith resolved this objection in an order of February 11, 2013, (ECF No. 67) which
allowed for the filing of clearer annotated copies of the hearing exhibits. I note that it is these later-filed exhibits
which I have reviewed in reaching my decision. (See Respondent’s Trial Exhibits 4 and 5, ECF No. 79-6 and 79-7,
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supported by the lack of any indication, such as “puckering of the brain,” that N.N. experienced
tissue loss in conjunction with these hyperintensities. According to Dr. Wiznitzer, this feature
differentiates terminal zones from scarring. (Tr. 209.)
Importantly, Dr. Shuman did not dispute Dr. Wiznitzer’s description of terminal
myelination, but merely argued in rebuttal that N.N. was too old at the time of his MRI to have
exhibited immature myelination, and that the spaces around N.N.’s vessels do, contrary to Dr.
Wiznitzer’s opinion, indicate tissue loss. (Tr. 250-51; see also ECF No. 84-1, pp. 17-19.) In
particular, Dr. Shuman characterized the image presented by Dr. Wiznitzer in Trial Ex. 5 as “a
smooth anatomic phenomenon of age, age-limited, age-dependent in the first year of life.” (Tr.
250.) N.N., however, was eleven years old at the time Ex. 42-A was imaged, and according to
Dr. Shuman, N.N.’s MRI “is not a smooth band or zone of terminal myelination. It is instead
increased size of spaces around the vessels.” (Id.) Thus, Dr. Shuman contended that N.N.’s
imaging is not age-appropriate and that it shows tissue loss, because of the size of the “Virchow-
Robin” spaces around the vessels. (Tr. 250-51.) Dr. Shuman also stressed that the asymmetry of
the perivascular spaces indicates that it is more likely to be pathologic than developmental.14 (Tr.
251.)
However, Dr. Shuman’s assertion that terminal myelination is limited to the first year of
life is not supported by the medical literature submitted in this case. Assessment of Normal
Myelination with Magnetic Resonance Imaging, submitted by Respondent as Trial Exhibit 4,
indicates, just as Dr. Wiznitzer testified, that terminal zones may remain hyperintense under T2
imaging into the second decade of life.15 (Trial Ex. 4, p. 3 (Table 1).) Moreover, the image
relied on by Dr. Wiznitzer within Trial Exhibit 4 shows the brain of a six-year-old girl rather
than an infant in the first year of life, and, consistent with Dr. Wiznitzer’s opinion in this case,
Trial Exhibit 4 indicates that “small areas of hyperintensity are considered to be a normal
developmental variant in children and at times are even identifiable in the young adult
population.” (Trial Ex. 4, p. 11 (emphasis added).) To the extent that Dr. Shuman’s later
supplemental report takes issue, not with the presence of any hyperintensity in an eleven-year-
old, but with the greater prominence of the hyperintensities found in N.N.’s MRI compared to
the six-year-old girl presented in Exhibit 4, he does not support this part of his argument with
any citation to any medical literature indicating what degree of hyperintensity would be
considered age-appropriate for an eleven-year-old. (ECF No. 84-1, p. 17.)
Additionally, Dr. Shuman contends that N.N.’s MRI does not show terminal myelination,
but, rather, shows enlarged perivascular spaces. He notes that “to see any perivascular spaces in
this age is remarkable, worthy of further comment.” (Tr. 251.) Trial Exhibit 4, however,
filed on April 12, 2013.) Dr. Shuman additionally submitted his own reproduction of Trial Exhibit 5 (ECF No. 85-
2), which I have also reviewed.
14 Dr. Shuman does not provide any citation for his assertion that asymmetry is necessarily pathologic. I note,
further, that Dr. Shuman and Dr. Bauza are not in agreement on this point – at least as regards asymmetry in the size
of the hippocampi. (Tr. 117.)
15 I note that while Dr. Shuman clearly takes issue with Dr. Wiznitzer’s comparison of N.N.’s MRI studies to those
depicted in Assessment of Normal Myelination with Magnetic Resonance Imaging, he does not appear to challenge
the article’s authority as a general proposition, characterizing it as “a state-of-the-art perspective on the current
status of understanding MRI imagery in early childhood.” (ECF No. 84-1, p. 14.)
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indicates that although perivascular spaces may contribute to signal hyperintensity, they can be
distinguished from terminal zones “by looking for small bands of low signal, normally
myelinated brain separating the high signal regions from the ventricles.” (Trial Ex. 4, p. 11.) This
pattern, which according to the article is present with terminal zones but not perivascular spaces,
is illustrated in figure 9(B) and appears to closely match the pattern displayed in N.N.’s own
MRI image at Ex. 42-A. Moreover, it is exactly what Dr. Wiznitzer indicated was present when
he described N.N.’s MRI image, noting that “if we look closely at the imaging study, there is a
band of normal myelinated white matter sitting between these linear intensities, and the ventricle,
the ventricular wall is basically smooth.” (Tr. 208.)
Thus, on the whole, I find Dr. Wiznitzer’s explanation for the presence of the trigonal
hyperintensities more persuasive than Dr. Shuman’s. Although it is undisputed that Exhibits 42
A and B illustrate linear hyperintensities within N.N.’s white matter, Dr. Wiznitzer offered a
coherent explanation for their presence that is supported by medical literature, arguing that these
hyperintensities are a normal developmental variant known as terminal myelination. Dr.
Shuman’s response to this explanation, however, seemed, if not completely at odds with the
medical literature in the record, at the very least less consistent with it. Dr. Shuman appears to
have conceded the point that terminal myelination can appear as hyperintense as a normal
developmental variant, but argued that it is not an age-appropriate finding for N.N. and that the
hyperintensity should be interpreted as perivascular spaces, which would not be normal. For the
reasons discussed above, however, I do not find these arguments to be in accord with the medical
literature submitted in this case.
2. Bilateral hyperintensity of the hippocampi
Exhibit 43-A and 43-B are axial images from N.N.’s 2011 and 2005 MRI studies,
respectively. (Tr. 50-52; 61-62.) Dr. Shuman argued that these images show bilateral
hyperintensity of the posterior portions of the hippocampi. (Tr. 57; 63.) He suggested that the
level of T2 signal may be at the edge of normal limits, but noted that signal from a normal brain
‘would not be a globular, irregular, intense signal as you see here.”16 (Tr. 57.) According to Dr.
Shuman, this is significant because “the hippocampi is a very prominent part of the limbic
system. It’s a very prominent site of attack in encephalitis, especially limbic encephalitis.” (Tr.
57-58.)
Citing to “Limbic Encephalitis in Children and Adolescents,” an article by Haberlandt
published in Archives of Disease in Childhood (Ex. D), Dr. Wiznitzer disagreed. He indicated
that limbic encephalitis causes inflammation of the anterior part of the hippocampal region,
rather than the posterior portions of the hippocampi as Dr. Shuman suggested. (Tr. 170-75.)
Describing the hyperintensity that Dr. Shuman pointed out in Exhibit 43-A, Dr. Wiznitzer
testified that “we’re in a different territory than where the imaging classically tells us we should
see abnormalities with limbic encephalitis.”17 (Tr. 182.) For example, Dr. Wiznitzer pointed out
16 Ex. 43-A is marked with white arrows indicating areas of hyperintensity Dr. Shuman described. (Tr. 56.)
17 Petitioners argue in their post-hearing briefing that they are not obligated to prove “limbic encephalitis,” but only
“encephalitis” in a non-specified form. (ECF No. 94, pp. 16-17.) That is true, as a matter of law. However, Dr.
Shuman has consistently and specifically opined that N.N.’s MRI studies show and N.N.’s clinical symptoms are
explained by “limbic encephalitis.” (See, e.g., Ex. 26, p. 11 (“An MRI of his brain 1 year into his post-vaccinal
course illustrates demyelinated lesions of his limbic system. This pattern of damage is seen after a viral encephalitis
17

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that the MRI image of “three weeks” appearing as part of Figure 1 of the Haberlandt article
displays hyperintensity in this anterior location. (Tr. 171-72; Ex. D, p. 187.)
Dr. Shuman rejected Dr. Wiznitzer’s reading of the Haberlandt article, arguing that
“there’s not enough information [in the three-week image] to tell you whether or not Dr.
Wiznitzer is right that this is confined to the anterior one-third of the hippocampus. I will tell
you that Dr. Wiznitzer is not right that limbic encephalitis is confined to the anterior one-third of
the hippocampus.” (Tr. 241.) Dr. Shuman asserts that the Haberlandt article speaks of
inflammation anywhere in the mediotemporal lobe as evidence of limbic encephalitis, and does
not at any point limit its discussion by use of the modifying “anterior” descriptor. (ECF No. 84-
1, p. 2.)
Dr. Shuman is correct in that I do not see any text in the Haberlandt article limiting
evidence of limbic encephalitis to the anterior portion of the hippocampus. (Ex. D.) However,
Dr. Wiznitzer relied on the images from the Haberlandt article as only one example of what he
described as a “classic” pattern that he has observed in his own clinical practice (Tr. 182-83), and
Dr. Shuman has not produced any literature supporting his position that hyperintensity of the
posterior hippocampus in particular is evidence of limbic encephalitis.18
Nonetheless, even assuming arguendo that Dr. Shuman’s reliance on a posterior
hippocampal abnormality as a sign of limbic encephalitis was sufficient, Dr. Wiznitzer
additionally casts significant doubt on Dr. Shuman’s interpretation of that hyperintensity as
abnormal. With regard to the posterior hyperintensity pointed out by Dr. Shuman, Dr. Wiznitzer
argued that this was an “artifact” of the MRI process and was not an abnormality at all. (Tr. 182-
83.) Dr. Wiznitzer pointed out that when viewed from a coronal plane, the hyperintensity
identified in Exhibit 43-A is rectangular in shape. (Tr. 184.) According to Dr. Wiznitzer, a true
finding of abnormality would look “fluffy” or have an “irregular contour” whereas this image is
“like a little peg.” (Tr. 185.)
Dr. Shuman acknowledged the rectangular shape (Tr. 240), but argued that the
hyperintensity in N.N.’s MRI cannot be an artifact, because it is visible in different planes (ECF
No. 84-1, p. 6-7). In particular, Dr. Shuman stresses that both N.N.’s 2005 and 2011 MRI
studies show the same hyperintensity, arguing that this makes it highly unlikely that the image is
an artifact, which should be difficult to reproduce. (Id.) However, Dr. Shuman, does not provide
any supporting citations for his arguments, and I am left without the requisite background
information regarding the causes and nature of MRI artifacts to find it persuasive. That is, Dr.
Shuman has not substantiated his assertion that MRI artifacts are transient, unreproducible, or
in which the tissues of the limbic system have been affected. The clinical pattern of his “Childhood Disintegrative
Disorder exactly fits the neuroradiologic pattern of his viral (limbic) encephalitis.”).) With Dr. Shuman’s opinion
explicitly limited in that way, even though Petitioners are not obligated to demonstrate “limbic encephalitis” in
particular, they have not presented any medical evidence in this case establishing any other form of encephalitis.
18 Dr. Shuman asserts in his post-hearing supplemental report that the hyperintensity in N.N.’s 2011 MRI is not
limited to the posterior hippocampi, but is actually found throughout the entire hippocampi, including the anterior
portions. (ECF No. 84-1, p. 5.) This is not consistent with his hearing testimony, however, in which he clearly
characterized the hyperintensity as being posterior. (Tr. 57.) Moreover, at no point has Dr. Shuman, in his
testimony or his written reports, presented any image from either of N.N.’s MRI studies which he would contend
illustrates hyperintensity of the anterior hippocampi.
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limited to a single plane. Dr. Wiznitzer, on the other hand, supported his argument with
examples from the medical literature, showing the court “normal” MRI images featuring similar
artifacts.19
For example, Respondent’s Trial Exhibit 2 is an MRI image of a normal 24-year-old
male.20 (Tr. 189.) According to Dr. Wiznitzer, it, like Exhibit 43-A, shows “the exact same
artifact, a bright, somewhat rectangle, located on either side of the fluid-filled space in the exact
same location in fact.” (Tr. 190.) Dr. Wiznitzer also produced an article from the American
Journal of Neuroradiology, September 1999, titled “Normal Myelination of the Pediatric Brain
Imaged with FLAIR Magnetic Resonance Imaging.” (Tr. 191; Trial Ex. 3.) Looking at image
“I” from that article, an MRI scan of a normal three-year-old, Dr. Wiznitzer indicated that this is
“a slice of the brain that is very similar, in a similar location to the one listed on Exhibit 43-A.
Both of these are FLAIR studies. And I think we can appreciate a bright linear artifact on both
sides of the fluid-filled space. It looks more like, I would call it like a straw, a straw shape.” (Tr.
191-92, 193.) Trial Exhibit 4, presented by Dr. Wiznitzer, is an article titled “Assessment of
Normal Myelination with Magnetic Resonance Imaging” from Seminars in Neurology. (Trial
Ex. 4.) Looking at image A on page 23 of Trial Ex. 4, the scan of a normal 28-month-old, Dr.
Wiznitzer argued that this image likewise shares the same brightness on either side of the CSF
fluid-filled space. 21 (Tr. 194.)
Again I find that Dr. Wiznitzer presents the more compelling explanation with regard to
this particular point. There is disagreement among these two experts on whether hyperintensity
only of the posterior hippocampi, without involvement of anterior portions, represents a marker
of limbic encephalitis. This ambiguity alone might be indication enough that Petitioners have
failed to meet their burden on this issue. But in any event, it would appear that the anterior
hyperintensity shown on N.N.’s MRI may be no indication of any abnormality at all. Dr.
Wiznitzer’s opinion that it is nothing more than an artifact of the MRI process is compelling,
particularly in light of the multiple examples he provides from medical literature.
19 Moreover, for the reasons discussed in subsection B below, I find Dr. Wiznitzer, as a currently practicing
clinician, to be more qualified to speak about the quality of contemporary MRI technology.
20 Dr. Shuman argues in his supplemental report that Dr. Wiznitzer is wrong to claim that this 24-year-old male is
“normal” with no history of central nervous system problems, since this individual suffered from multiple sclerosis.
Dr. Shuman stops short, however, of explicitly arguing that a diagnosis of multiple sclerosis would explain the
artifact Dr. Wiznitzer indicated was present. (ECF No. 84-1, pp. 5-6.) In any event, this is only one of multiple
examples presented by Dr. Wiznitzer.
21 These images were not previously produced to Petitioners’ counsel prior to the hearing. At the hearing,
Petitioners’ counsel raised objections to the images on the basis of foundation, image quality, and lack of notice.
(Tr. 186-96.) I note, however, that Special Master Campbell-Smith allowed Petitioners an opportunity to submit a
supplemental report rebutting these submissions, which they filed on May 17, 2013. (See ECF No. 84-1.) She
concluded that such procedure would give Petitioners a full and fair opportunity to address the substance and quality
of these exhibits. I agree, and therefore I am considering them despite the objection noted above. This is consistent
with Program rules, which state that “in receiving evidence, the Special Master will not be bound by common law or
statutory rules of evidence but must consider all relevant and reliable evidence governed by principles of
fundamental fairness to both parties.” (Rule 8 of the “Vaccine Rules,” which make up Appendix B of the Rules of
this Court.)
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3. Hyperintensity in the ventricle lining
Still addressing Exhibit 43-A, Dr. Shuman additionally noted that “there is signal
intensity in the subependymal, ependymal.” (Tr. 53-54.) That is, “there is signal intensity
around the lining of the lateral ventricle.” (Tr. 54.) This is significant, argued Dr. Shuman,
because “this is a favored spot for scarring in any kind of inflammatory process.” (Id.)
Although Dr. Shuman acknowledged that it does not reveal the nature of the inflammation, he
argued that subependymal T2 signal intensity is evidence of past inflammation. (Id.)
Dr. Wiznitzer, however, argued that bright signal along the sides of the ventricles on
FLAIR images are normal findings. (Tr. 199.) Turning to Trial Exhibit 3, p. 1409, Figure I, Dr.
Wiznitzer pointed out that this image shows “bright signal capping on top of the ventricle” which
Dr. Shuman would characterize as abnormal. (Tr. 200.) Dr. Wiznitzer explained that this type
of brightness along the ventricular wall is known as “anterior cap,” and is a well-known
radiologic finding on T2 FLAIR images. (Id.) According to Dr. Wiznitzer, it is considered
normal. (Id.) Dr. Wiznitzer additionally quoted text from Normal Myelination in the Pediatric
Brain, underscoring the point that it is considered a normal finding after about eight months of
age. (Tr. 201-02.) He further pointed out that it is a finding caused by the FLAIR technique and
is not found on the normal T2 study. (Tr. 202-03.)
In response, Dr. Shuman characterized the issue as “a throw away,” and noted that he
only pointed it out “because [he] was fascinated by it.” (Tr. 247.) He acknowledged that
hyperintensity of the ventricle lining is a normal finding “to a degree,” but argued that the
thickness in N.N.’s case (which Dr. Shuman placed at over a millimeter) is pathologic for a child
of N.N.’s age. (Tr. 245-47.) In other words, Dr. Shuman argued that “this is a pathological
variant of a normal finding.” (Tr. 247-48.) Significantly, although Dr. Shuman raised an issue
with regard to the thickness of the hyperintensity shown on N.N.’s MRI, at no point did he offer
any objective or quantifiable description of what would be a normal thickness. Dr. Shuman’s
argument was couched completely in the relative terms of “thick” versus “thin,” without any
context against which to measure.
Dr. Wiznitzer made a strong case, supported by the medical literature, that this type of
finding is not necessarily abnormal. Dr. Shuman, on the other hand, did not substantiate his
counter-argument that N.N.’s case represents a pathological variant of what he admitted was a
normal finding. But in any event, given that Dr. Shuman acknowledged at the outset that
hyperintensity of the ventricle lining is a non-specific indication of inflammation, that the finding
is normal “to a degree,” and ultimately dismissed the finding as a “throw away,” I find that, even
if this type of hyperintensity were abnormal, there is an insufficient basis to conclude that it is
evidence of encephalitis in particular.
4. Enlarged ventricles
Exhibit 44-A is an axial cut just above ear level from N.N.’s 2011 MRI study. (Tr. 64.)
Exhibit 44-B is a similar image from N.N.’s 2005 MRI study. (Tr. 69.) Dr. Shuman argued that
a comparison of these two images shows that N.N. lost tissue between 2005 and 2011, because
the ventricles appear larger in the 2011 image than in the 2005 image. (Tr. 69-70.) In particular,
Dr. Shuman argues that while the 2005 MRI study shows appropriately-sized ventricles, the
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2011 image shows ventricles that are “huge” for a child of N.N.’s age. (Tr. 64, 69.) According to
Dr. Shuman, tissue loss is the only explanation for this. (Tr. 64.)
Dr. Wiznitzer, on the other hand, argued that “if you look at ventricular size over time,
and this is also well-known, that in the very young child, ventricles tend to be a little bit narrower
and smaller, but as you get older, as an older child, they tend to get a little bit wider, and if you
don’t account for that fact, you may misinterpret or over-read the information.” (Tr. 212.) In
rebuttal, Dr. Shuman acknowledged that “the lateral ventricles do have normative values,” but
reiterated his opinion that N.N.’s ventricles are “pathologically enlarged” in the 2011 MRI. (Tr.
243-44.) Neither party, however, has submitted any evidence establishing those normative
values.
Here, there is a conflict on this point between these two experts unresolvable on this
record. I find that Petitioners have not established that N.N.’s ventricles were pathologically
enlarged, because while they have shown a change over time, they have failed to come forward
with any persuasive evidence demonstrating the significance of that change, or that the resulting
size of N.N.’s ventricles is abnormal.
5. Hyperintensity in the fornices
Finally, according to Dr. Shuman, Exhibits 44-A and 44-B also show hyperintensity
indicative of scarring in the body of the fornix.22 (Tr. 65, 69-70.) Dr. Shuman argues that in a
normal brain “the deeply myelinated structures should give you the norm for the appearance of
the columns in the body of the fornix.” (Tr. 66.) He testified that Exhibit 44-A, however, “is
consistent with either a direct encephalitic attack on the myelinated tissue of the fornix or with
secondary gliosis to the columns of the fornix from extensive attack on the hippocampus of
origin of the fornix.” (Tr. 66-67.)
Additionally, Exhibit 45-A is an axial image from N.N.’s 2011 MRI cut lower than
Exhibit 44-A. (Tr. 70-71.) According to Dr. Shuman, this provides another view of the scarring
of the fornix. (Tr. 71-72.) That is, according to Dr. Shuman “these columns of the fornices,
have too much T2 signal intensity and are therefore too white and not black enough.” (Tr. 72.)
Exhibit 45-B is a similar image from N.N.’s 2005 MRI. Dr. Shuman indicated that this image
shows signal intensity in the same region, but does not have sufficient resolution to identify the
columns of the fornix. (Tr. 74-75.)
Dr. Wiznitzer argued, however, that the hyperintensity that Dr. Shuman pointed out in the
fornix is actually a further example of the “anterior cap” phenomenon discussed above with
regard to the ventricle lining. (Tr. 197-200.) That is, Dr. Wiznitzer explains that “what we have
is the brightness of the fornix in this area is actually this thin rim of the ventricular wall going by
it and lighting it and basically contributing to that. Remember we said it’s thought to be due to
the packing of the axons? What’s a fornix but a group of axons that are going by? So that’s all
this is.” (Tr. 202-03.)
Again, as with the ventricle lining, Dr. Shuman does not appear to dispute that this type
of hyperintensity can be a normal finding, but rather disputes that it is an age-appropriate finding
for N.N. (ECF No. 84-1, pp. 12-14.) Specifically, Dr. Shuman argues that “a normal
22 The fornix is marked on both Exhibits 44-A and 44-B by a white circle. (Tr. 66, 69-70.)
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periventricular zone at birth is invisible. A normal periventricular subependymal zone at 1 year
of age is thin. Normally the zone is still thin until the 4th decade, but it clearly becomes thicker
and tougher with each decade.” (Id., p. 13.) Thus, Dr. Shuman acknowledges that N.N.’s MRI
should demonstrate some level of hyperintensity in the region of the fornix. He simply contends
that what appears is too “thick” for an eleven year old. In this regard, however, as with the
hyperintensity of the ventricle lining, Dr. Shuman has failed to offer any normative values from
which to judge the appropriate thickness. He has therefore failed to substantiate his assertion
that N.N.’s fornix, which he seems to concede should show some hyperintensity, is
pathologically hyperintense.
B. There is no qualifications gap between these experts regarding MRI interpretation
Dr. Shuman has an impressive curriculum vitae, and there is no question that as a
pediatric neuropathologist he is well qualified to interpret N.N.’s MRI studies. (Ex. 27.) In fact,
Petitioners argue that Dr. Shuman’s certification from the American Society of Neuroimaging is
particularly significant, making him more qualified than Dr. Wiznitzer to interpret N.N.’s MRI
images. (Tr. 146-47.) In effect, Petitioners argue that while Dr. Wiznitzer may have sufficient
experience as a pediatric neurologist to be considered an expert in neuroimaging for this case, he
lacks the additional specialization in neuroanatomy held by Dr. Shuman. (Id.)
Dr. Wiznitzer, however, is also well qualified to review these MRI studies. Although Dr.
Shuman maintains certification from the American Society of Neuroimaging, Dr. Wiznitzer does
have significant clinical and teaching experience devoted to pediatric neurology, which requires
the use of MRI and other imaging techniques for diagnostic purposes. (Tr. 132-41.) Moreover,
in seeking to argue that Dr. Wiznitzer has no more experience with MRIs than does the typical
practicing neurologist, Petitioners overlook Dr. Wiznitzer’s particular history. Dr. Wiznitzer
testified that he has extensive background with neuroimaging, having written papers on the use
of MRI in pediatric neurology and participated in studies on the subject. (Tr. 143-44.) Dr.
Wiznitzer also participates in developing the board-certification exam for pediatric neurology, in
which he is specifically involved in the testing concerning neuroimaging. (Tr. 135-36.) Dr.
Wiznitzer has also been an invited lecturer for both the National Institutes of Health and the
American Society of Neuroimaging, speaking to pediatric issues in neuroimaging. (Tr. 144.)
It is also worth noting that Dr. Wiznitzer challenges the weight of Dr. Shuman’s
“certification” from the American Society of Neuroimaging, pointing out that it is not a board
certification, but simply a societal designation which results from a less rigorous process than
would a board-certification. (Tr. 147-48.)
In addition, as Respondent points out, Dr. Shuman has not been a practicing clinician
since 2006, but has instead spent that time working as a legal consultant. (Tr. 108.) While being
a legal consultant is not in itself disqualifying, this criticism is not without significance. For
example, in his supplemental report rebutting Dr. Wiznitzer’s hearing presentation, Dr. Shuman
argued--without supporting citation and therefore relying on his own expertise--that Trial Exhibit
2, an image captured in 1996, cannot be compared to N.N.’s 2005 and 2011 images because “the
technology is old, clumsy, and imprecise. It produced factitious signal where 2005 and 2011
techniques do not.” (ECF No. 84-1, p. 5.) Yet Dr. Shuman testified that he stopped his clinical
practice in 2006, and acknowledged that he has not read an MRI in a clinical setting since that
time. (Tr. 108-10.) His CV lists his most recent academic appointment as ending in 1991, his
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most recent medical licensure and publication as 2003, and his most recent continuing medical
education seminar as 2008. (Ex. 27, pp. 3, 8, 25.) Further, there is nothing in the record to
indicate Dr. Shuman’s exposure through legal consulting to contemporary MRI technology. Dr.
Wiznitzer, on the other hand, remains a practicing neurologist who makes current use of MRI
technology. (Ex. B; Tr. 132-44.) Thus, to the extent that Dr. Shuman himself would seek to
make an issue of the efficacy of contemporary MRI technology, Dr. Wiznitzer would seem to be
the more qualified expert to speak to the practical limitations of MRI technology as it existed in
2011 when N.N.’s most recent MRI study was conducted.
Ultimately, I am faced with two qualified experts – both pediatric neurologists – with
different strengths. While Dr. Shuman is a pathologist with a certification in neuroimaging, Dr.
Wiznitzer is a current practitioner with up-to-date clinical skills in utilizing neuroimaging not
demonstrated by Dr. Shuman. I cannot say that one is inherently more qualified than the other.
In any event, even assuming arguendo there was any qualifications gap between these two
experts as Petitioners suggest, I find that Dr. Wiznitzer more than closed that gap by presenting
coherent and detailed testimony that was supported by specific references to medical literature.
(See, e.g., Caves v. HHS, 100 Fed. Cl. 119, 134 (2011), aff’d, 463 Fed. Appx. 932 (2012)
(quoting Gen. Elec. Co. v. Joiner, 522 U.S. 136 (1997)) for the proposition that “Daubert does
not require a trial court ‘to admit opinion evidence that is connected to existing data only by the
ipse dixit of the expert.’”); see also Hennessey v. HHS, No. 01-190V, 2009 WL 1709053, at *42
(Fed. Cl. Spec. Mstr. May 29, 2009) (“When experts disagree, many factors influence a fact-
finder to accept some testimony and reject other contrary testimony. Objective factors, including
the qualifications, training, and experience of the expert witnesses and the extent to which their
proffered opinions are supported by reliable medical research, other testimony, and the factual
basis for their opinions, are all significant in determining what testimony to credit and what to
reject.”).)
C. The reports of Drs. Bauza and Hewell are not of strong import in resolving this
case.
Of course, Drs. Shuman and Wiznitzer are not the only two physicians to have offered
opinions on N.N.’s MRI studies. N.N.’s 2005 MRI was initially interpreted by Dr. Brett Hewell,
a radiologist. (Ex. 6, p. 25.) His later 2011 MRI was initially reviewed by Dr. Jose Bauza, a
neuroradiologist. (Ex. 25, p. 1.) Dr. Hewell concluded that N.N.’s 2005 MRI was normal, while
Dr. Bauza found abnormality in the 2011 MRI. (Ex. 6, p. 25; Ex. 25, p. 1.) Not surprisingly,
each party favors the report which supports that party’s theory, while discounting the other.
Ultimately, I conclude that neither report is of much weight in resolving this case.
At the expert hearing, Dr. Shuman questioned the validity of Dr. Hewell’s conclusion by
raising concerns about the state of radiology in general, referring to it as being in “crisis” and
claiming that radiologists do not take sufficient time or care in their interpretations. (Tr. 28-30.)
He was also critical of the fact that Dr. Hewell does not specialize in neuroradiology. (Id.) When
asked about the basis for his criticisms, however, Dr. Shuman acknowledged that he did not
know Dr. Hewell and had never spoken to him about this case. (Tr. 111.) Asked what he knew
about Dr. Hewell’s handling of N.N.’s case, the only detail Dr. Shuman gleaned from the record
was that Dr. Hewell did not review the images until 40 days after the study was completed. (Id.)
Cross-examination indicated, however, that the delay had no impact on the quality of the images
available for interpretation. (Tr. 111-13.) Dr. Shuman was also critical of the quality of the
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images generated in the 2005 MRI study (Tr. 26-27), though he nonetheless testified at the
hearing that each of the abnormalities he alleged to be present were visible in both the 2011
study and the 2005 study. 23 (See Section A above.)
Petitioners argue that Dr. Bauza’s findings, on the other hand, are significant
confirmation of Dr. Shuman’s own opinion. In fact, Petitioners go so far as to claim that Dr.
Bauza’s conclusions are superior to that of either Dr. Shuman or Dr. Wiznitzer, because Dr.
Bauza specializes in neuroradiology. (ECF No. 94, p. 8.) I note, however, that Petitioners’
characterization of Dr. Bauza as a “treating physician” is somewhat misleading. (ECF No. 94, p.
8.) Petitioners argue that Dr. Bauza “was not hired for the purpose of testifying for either party”
(ECF No. 92, p. 8), and that N.N. was referred to Dr. Bauza by his treating physician, Dr. Fischer
(Id, p. 7.). Yet Dr. Shuman acknowledged at the hearing that the decision to do another MRI in
2011 was made at Dr. Shuman’s behest, after he had begun working with Petitioners’ counsel on
this case. (Tr. 26.) Moreover, Dr. Shuman indicated that he believed Mr. Webb was in direct
contact with Dr. Bauza. (Tr. 116.) Thus, even if Dr. Bauza was not hired for the particular
purpose of testifying, and even if the referral technically came from N.N.’s treating physician,
Dr. Fischer,24 Dr. Shuman’s testimony indicates that Dr. Bauza’s MRI study arose not for
treatment purposes, but for furtherance of the instant claim. This is enough to cast doubt, not on
Dr. Bauza’s integrity, but on his neutrality and on his purpose relative to this case.
In any event, Respondent points out that Dr. Bauza’s report does not completely support
Dr. Shuman’s viewpoint. (ECF No. 93, pp. 15-16.) Whereas Dr. Shuman believes that N.N.’s
MRI shows enlarged ventricles, Dr. Bauza did not make that finding. (Tr. 116-17.) Dr. Shuman
also disagreed with Dr. Bauza’s opinion that the asymmetrical size of N.N.’s hippocampi is a
normal variant. (Tr. 117.)
In the final analysis, I conclude that neither Dr. Hewell’s nor Dr. Bauza’s report is
entitled to great weight in resolving this case. I reach this conclusion chiefly because of the
issues discussed in detail above at pp. 14-22. Although the notations of treating physicians will
often be accorded significant weight,25 in this instance, I find that neither Dr. Bauza’s nor Dr.
Hewell’s reports change my view of this issue.
23 Dr. Shuman’s criticism of Dr. Hewell and the 2005 image quality may be somewhat blunted, however, in that
N.N.’s CT scan of July 2005, conducted by a different organization, was also interpreted as normal, which would
seem to offer some corroboration for Dr. Hewell’s interpretation of the 2005 MRI. (Ex. 6, p. 11.) In his expert
report, Dr. Shuman admitted that he has not reviewed the CT scan or the accompanying report, but speculated based
on the subsequent MRI that the CT scan must have been abnormal. (Ex. 26, p. 2.) At the hearing, however, Dr.
Shuman acknowledged that he had no basis to make that claim. (Tr. 110.)
24 Furthermore, I note that Dr. Fischer’s records also indicate that Dr. Shuman referred N.N. to Dr. Fischer, and that
Dr. Shuman wrote a note advising Dr. Fischer of his interpretation of N.N.’s first MRI as abnormal. (Ex. 23, p. 1.)
Because it appears from these records that Dr. Shuman was attempting to exert influence over Dr. Fischer from the
very beginning of her treatment of N.N., I am disinclined to rely on the conclusions of either Dr. Fischer or Dr.
Bauza as corroboration of his opinions. To do so would be somewhat circular reasoning, since it appears that those
conclusions may have been reached based, at least in part, on Dr. Shuman’s own input.
25 See, e.g., Capizzano v. HHS, 440 F.3d 1317, 1326 (Fed. Cir. 2006)(noting that “medical records and medical
opinion testimony are favored in vaccine cases, as treating physicians are likely to be in the best position to
determine whether a ‘logical sequence of cause and effect shows that the vaccination was the reason for the
injury.’”)
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In the first place, the two reports contradict each other, one finding evidence of
encephalitis in an MRI image, the other not. But far more important is the fact that their reports,
neither of which exceeds a single paragraph, do not provide any insight into the reasoning
behind the conflicting interpretations of Drs. Hewell and Bauza. As Respondent points out, it is
quite clear from this case that qualified experts can and do differ on questions of MRI
interpretation. (ECF No. 93, p. 16.) That much was clear from the reports and testimony of Drs.
Shuman and Wiznitzer. That two additional physicians have similarly produced conflicting
findings is not in itself enlightening with regard to the question of whether Dr. Shuman or Dr.
Wiznitzer has presented superior evidence explaining why one interpretation is correct while
another is wrong. Dr. Wiznitzer and Dr. Shuman have not simply reported their ultimate
findings, but have submitted their underlying reasoning to the scrutiny of the court, through
extensive reports and testimony. The same cannot be said of either Dr. Hewell or Dr. Bauza.
Thus, these two additional reports do little more than further highlight the disagreement
between Drs. Shuman and Wiznitzer, without providing any further elucidation of the issues
involved in MRI interpretation as explained by the competing experts in this case. Ultimately, I
find that the conflicting reports of Drs. Hewell and Bauza are substantially outweighed by the
testimony of those experts who testified fully, Drs. Wiznitzer and Shuman.
D. Conclusion
Dr. Shuman identified five possible abnormalities visible in N.N.’s MRI scans. Dr.
Wiznitzer, however, offered a competing interpretation in each instance, supported not merely by
his own experience and expertise, but also by corroborating medical literature. In contrast, many
of Dr. Shuman’s key assertions regarding N.N.’s MRIs, though undoubtedly made by an expert
in the field, were left otherwise unsubstantiated. For this reason, and for all the reasons above, I
find that Dr. Wiznitzer was substantially more persuasive than Dr. Shuman with regard to the
interpretation of N.N.’s MRI images. I also found that the conflicting opinions of N.N.’s treating
physicians, Drs. Howell and Bauza, were outweighed by the experts in this case. I therefore find
that Petitioners have not established that it is more likely than not that N.N. experienced
inflammation of the brain.
IX
CLINICAL SIGNS AND STYMPTOMS
Dr. Wiznitzer also argued that another reason that I should reject Petitioners’ Table
Encephalitis claim is that, even accepting Special Master Moran’s findings concerning N.N.’s
symptoms displayed in late November of 2004, N.N. was still not displaying at that time other
clinical indicators of encephalitis, including seizures, respiratory regulators, or persistent
movement disorder. (Tr. 228-29.) Dr. Wiznitzer relied on certain medical articles in this regard.
But it is unnecessary for me to address Dr. Wiznitzer’s analysis in this regard, since
Petitioners, as explained above, have failed to demonstrate that the MRI’s showed the existence
of a prior encephalitis.
On the other hand, Petitioners argue that the symptoms found by Special Master Moran
were the first symptoms of an encephalitis. But their own expert, Dr. Shuman, acknowledged
that without MRI evidence showing the existence of a prior limbic encephalitis, he could not
25

Case 1:07-vv-00810-NBF Document 101 Filed 02/18/15 Page 26 of 26
offer his opinion that N.N. suffered an encephalitis in 2004. (Tr. 109.) And, I have already
rejected his analysis of the MRI evidence.
Accordingly, on this record it is unnecessary for me to further address the clinical
symptoms that Special Master Moran found to have occurred in 2004. The analysis of the MRI
evidence alone fully decides this case.
X
CONCLUSION
The record of this case demonstrates plainly that N.N. and his family have been through a
tragic medical ordeal. They are certainly deserving of great sympathy. Congress, however,
designed the Program to compensate only those individuals whose injuries or deaths can be
linked causally, either by a Table Injury presumption or “causation-in-fact” evidence, to a listed
vaccine. In this case, as described above, no such link has been demonstrated. Accordingly, I
conclude that Petitioners in this case are not entitled to a Program award.26
s/ George L. Hastings, Jr.
George L. Hastings, Jr.
Special Master
26 In the absence of a timely-filed motion for review of this Decision, the Clerk of the Court shall enter judgment
accordingly.
26

================================================================================
DOCUMENT 2: USCOURTS-cofc-1_07-vv-00810-1
Date issued/filed: 2015-08-19
Pages: 29
Docket text: PUBLIC DECISION (Originally filed: 07/31/2015) regarding 109 Order on Motion for Review, Judge Vaccine Order/Opinion. Signed by Judge Nancy B. Firestone. (dpk) Copy to parties.
--------------------------------------------------------------------------------
Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 1 of 29
In the United States Court of Federal Claims
No. 07-810V
(Filed: August 19, 2015)*
*Opinion originally issued under seal on July 31, 2015
)
PETER and CHERIE NUTTALL, et )
al., ) Childhood Degenerative Disorder;
) Deference to Credibility
Petitioners, ) Determination; Vaccine; Table Injury;
) Encephalitis; Expert Testimony;
v. ) Treating Physician; Encephalitis
)
SECRETARY OF HEALTH and )
HUMAN SERVICES, )
)
Curtis R. Webb, Twin Falls, ID, for petitioners.
Voris E. Johnson, Civil Division, U.S. Department of Justice, Washington, DC, with
whom were Benjamin C. Mizer, Assistant Attorney General, Rupa Bhattacharyya,
Director, Torts Branch, Vincent J. Matanoski, Deputy Director, Torts Branch, and
Gabrielle M. Fielding, Assistant Director, Torts Branch, for defendant.
OPINION DENYING PETITIONERS’ MOTION FOR REVIEW
FIRESTONE, Judge.
Pending before the court is the motion of petitioners Peter and Cherie Nuttall, on
behalf of their son N.N., for review of the special master’s decision deny compensation
under the National Childhood Vaccine Injury Act of 1986, 42 U.S.C. §§ 300a-1 to -34
(“the Vaccine Act”), as amended.

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 2 of 29
N.N. suffers a severe neurological disorder diagnosed as childhood disintegrative
disorder (“CDD”).1 The petitioners allege that N.N.’s CDD is a sequela of encephalitis
caused by the measles, mumps, rubella (“MMR”) vaccination or the diphtheria-tetanus-
acellular pertussis (“DTap”) vaccination, both of which were administered on November
22, 2004.
In the hearing before the special master, the most important pieces of evidence as
to whether N.N. experienced encephalitis following his vaccinations were two magnetic
resonance imaging (“MRI”) studies of N.N.’s brain, one conducted in 2005 and one in
2011. Petitioners’ expert, Dr. Robert Shuman, a pediatric neurologist, testified that the
MRI indicated that N.N. had suffered viral encephalitis. The petitioners also presented
the report of Dr. Jose Bauza, the neuroradiologist who supervised N.N.’s 2011 MRI. Dr.
Bauza did not testify at the hearing, but in his report noted irregularities in N.N.’s MRI
which he found to be consistent with previous encephalitis. The government’s expert,
Dr. Max Wiznitzer, also a pediatric neurologist, disagreed with Dr. Shuman and Dr.
Bauza’s interpretation of the MRIs and testified that N.N.’s brain did not show signs of
encephalitis.
The special master found that the government’s expert was more persuasive than
petitioners’ expert, primarily because Dr. Wiznitzer was able to cite medical literature to
1 CDD is a rare condition in which a child develops normally, but then suffers a severe loss of
social, language, and other skills. Though CDD is considered part of the larger category of
autism spectrum disorder, this case, as Special Master Hastings explained in his opinion, “does
not concern whether autism can be caused by the vaccinations N.N. received, but only whether
N.N. suffered an encephalitis, with the first symptoms of that encephalitis arising within a Table
period after his vaccinations.” Special Master’s Decision (“Dec.”) at 4, ECF No. 100.

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 3 of 29
support his opinions that N.N.’s brain appeared normal in the MRI scans. The special
master decided that Dr. Bauza’s report was not entitled to significant weight because Dr.
Bauza’s opinion lacked reasoning sufficient to outweigh Dr. Wiznitzer’s testimony and
evidence. The special master also rejected petitioners’ argument that Dr. Bauza should
be given particular deference because, as a neuroradiologist, Dr. Bauza had a particular
expertise that made him more qualified than the other experts who testified in this case.
In addition, the special master rejected the petitioners’ argument that Dr. Bauza’s report
should be given additional consideration because Dr. Bauza was N.N.’s treating
physician, finding that Dr. Bauza had been retained in connection to the present litigation
and not merely for treatment purposes. The special master therefore concluded that
petitioners had failed to meet their burden of showing by a preponderance of the evidence
that N.N. had suffered encephalitis.
In their Memorandum of Objections, ECF No. 103 (“Pet. Mem.”), petitioners
argue that the special master’s decision was arbitrary and capricious because the special
master failed to correctly evaluate and give weight to Dr. Bauza’s opinion. The
government counters that the special master’s treatment of Dr. Bauza’s opinion was
sufficient, reasonable, and supported by the record.
Upon review of the record in this case, the court finds that the special master
carefully considered the medical arguments of both sides, and that his conclusion that
plaintiffs had not met their burden was reasonable in light of the evidence in the record.
Further, the court finds that it was reasonable for the special master to find that Dr. Bauza
was not more qualified or entitled to more deference that the other experts in this case.

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Therefore, petitioners’ motion is DENIED and the decision of the special master is
AFFIRMED.
I. BACKGROUND
A. Facts and Procedural History
On November 19, 2007, Peter and Cherie Nuttall filed a petition under the
Vaccine Act on behalf of their son, N.N., alleging that the MMR or DTap vaccinations
N.N. received in November of 2004, when N.N. was four years old, led to his CDD. In
addition to CDD, N.N. has been diagnosed with child psychosis, mental retardation,
ADD, and cognitive disorder – not otherwise specified. Dec. at 6. He was hospitalized
for self-injurious behavior for six days in August of 2006. In 2005 N.N. underwent an
MRI study, which a radiologist interpreted as normal.
The case was initially assigned to Special Master Moran, who conducted a fact
hearing on June 24, 2008, in Las Vegas, Nevada “in order to resolve factual disputes
regarding the onset of N.N.’s condition in light of conflicts between the medical records
and petitioners’ claims.” Id. at 6. Witnesses for N.N., including N.N.’s parents, two
grandparents, and a babysitter, testified that N.N.’s development began to acutely regress
within a week of his MMR vaccination. Id. at 5-6. However, the regression was not
noted in N.N.’s medical records until the spring of 2005. Id. at 5. In his findings of fact,
Special Master Moran found that N.N.’s symptoms, particularly his loss of language and
speech skills, did in fact arise shortly after his vaccinations on November of 2004. Id. at
7. The case was subsequently stayed pending the outcome of the Omnibus Autism

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Proceeding, which addressed and rejected the theory that the MRR vaccine can cause or
contribute to autism. Id.
In October of 2011, Dr. Jose Bauza, a neuroradiologist, oversaw a second MRI
study on N.N.’s brain. Pet. Mem. 4. Dr. Bauza found that the MRI study demonstrated
“subtle peritrigonal hyperintensity which are not expected for the patient’s age (11)” and
“hyperintensity within the hippocampus bilaterally.” Id. Dr. Bauza concluded that these
two findings were “in keeping with the patient’s history of previous encephalitis . . . .”
Id.
On November 7, 2011, after the Autism Omnibus Proceedings had concluded, the
case was reassigned to Chief Special Master Campbell-Smith. Dec. at 7. Petitioners
filed an amended petition on November 28, 2011. Am. Pet., ECF No. 45. The amended
petition alleged that N.N.’s severe neurologic disorder was a result (“sequela”) of a
limbic encephalitis, a Table Injury, attributable to his November 22, 2004, MMR or
DTaP vaccine.2 The government countered that N.N. suffers from CDD unrelated to his
vaccinations, and that N.N.’s MRI scans contain no evidence that N.N. experienced
limbic encephalitis. The government also argued that N.N. does not exhibit key
symptoms of encephalitis.
2 The Table entry for the DTaP vaccination provides for recovery for encephalopathy or
encephalitis with the first symptoms occurring within seventy-two hours after the vaccination.
42 C.F.R. § 100.3(a). The Table entry for the MMR vaccination provides recovery for
encephalopathy or encephalitis with the first symptoms occurring between five days and fifteen
days after the vaccination. Id.

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Following briefing preceding the expert hearing, Chief Special Master Campbell-
Smith accepted the petitioners’ argument that “encephalitis” for the purpose of the
Vaccine Injury Table meant any swelling of the brain. Dec. at 12. The special master
found that in order to recover, the petitioners must prove, first, that N.N. “in fact did
experience demonstrable brain inflammation,” second, that “the impact of the claimed
inflammation on [N.N.’s] brain was severe enough to result in the injuries he
experienced,” and third, “whether the location of the inflammation in N.N.’s brain could
have caused the symptoms he experienced.” Id. at 14.
The expert hearing was conducted on January 25, 2013, at the Office of Special
Masters in Washington, D.C. Dr. Max Wiznitzer, a pediatric neurologist, testified on
behalf of the government. Dr. Robert Shuman, also a pediatric neurologist, testified as an
expert on behalf of petitioners. Petitioners also submitted Dr. Bauza’s report as evidence
that N.N. suffered from encephalitis. N.N.’s medical records also included the report of
Dr. Brett Hewell, the radiologist who interpreted N.N.’s 2005 MRI as normal.
B. Special Master Hastings’s Findings
On March 8, 2013, the case was reassigned to Special Master Hastings.3 Special
Master Hastings accepted Special Master Campbell-Smith’s finding regarding the
definition of “encephalitis,” and Special Master Moran’s finding that N.N.’s symptoms,
particularly the loss of his speaking ability, occurred within the time period specified by
the Vaccine Injury Table. Id. at 8. Therefore, the special master focused whether N.N.
3 Any use of the term “the special master” shall hereinafter refer to Special Master Hastings
unless otherwise specified.

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experienced encephalitis. The special master found that the MRI scans were the best
evidence of whether N.N. did have encephalitis, and therefore, the “correct interpretation
of N.N.’s MRI studies is clearly the key to the case.” Id. at 14. The special master then
turned to the parties’ respective experts’ interpretation of the MRI studies.
1. Drs. Shuman and Wiznitzer’s competing interpretations of
N.N.’s MRI scans
In his interpretation of N.N.’s MRIs, the petitioners’ expert, Dr. Shuman identified
what he perceived to be five abnormalities which he argued were evidence of scarring of
the brain consistent with past encephalitis inflammation: (1) trigonal hyperintensities; (2)
hyperintensity of the hippocampi; (3) hyperintensity of the ventricle lining; (4) enlarged
ventricles; and (5) hyperintensity of the fornices. The government’s expert, Dr.
Wiznitzer, provided a contrary explanation on each of these five points, concluding the
MRI images were not consistent with previous encephalitis.
The petitioners argued that Dr. Shuman the better qualified expert to interpret an
MRI study because he received a certificate in neuroimaging from the American Society
of Neuroimaging. Conversely, the government argued that Dr. Wiznitzer was better
qualified because unlike Dr. Shuman, who had retired from clinical practice in 2006, Dr.
Wiznitzer continues to practice pediatric neurology and makes use of MRI technology as
part of his regular practice. However, after comparing the respective credentials of Dr.
Wiznitzer and Dr. Shuman, the special master found that “there is no qualification gap
between two experts.” Id. at 22. To the extent that there was any qualification gap, the
special master found that “Dr. Wiznitzer more than closed that gap by presenting

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coherent and detailed testimony that was supported by specific references to medical
literature.” Id. at 23. The experts’ respective opinions, and the special master’s analysis
of each point, are explained below.4
a. Trigonal hyperintensities
Dr. Shuman testified that images from N.N.’s 2005 and 2011 MRI studies
identified at trial as Exhibits 42-A and 42-B contained evidence of abnormalities in the
peritrigonal region on both sides of the brain. Dr. Shuman stated in an MRI scan of a
normal brain, myelination in the centrum semiovale, which he described as “the core of
the white matter,” should appear as a black space. But according to Dr. Shuman, N.N.’s
brain scan showed “linear radiant striped zones of T2 hyperintensity in the same region of
the peritrigonal white matter.” Dec. at 15. Dr. Shuman explained that in N.N.’s MRI, the
centrum semiovale was like “Swiss cheese.” Id. Dr. Shuman stated that the area “was
lighter than it ought to be” with “holes” and “lines in it.” Id. In addition, Dr. Shuman
found that N.N.’s MRI exhibit asymmetry, which he testified was consistent with
abnormality. Id. Dr. Shuman concluded that the hyperintensities in the MRI in that
portion of the brain was “old scaring, consistent with an old perivenular encephalitis.”
Id.5
4 Because the special master found that N.N.’a MRI showed no evidence of prior encephalitis,
the special master did not reach Dr. Wiznitzer’s testimony that N.N.’s clinical symptoms were
not consistent with encephalitis.
5 Dr. Shuman also testified that the perivascular spaces were asymmetrical, and stated that
“[a]ssymetr[y] usually means pathology.” Tr. 251. Because Dr. Shuman did not cite any
authority for this proposition, the special master did not find Dr. Shuman’s testimony on that
issue persuasive. Dec. at 16

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Dr. Wiznitzer did not dispute that Exhibits 42-A and 42-B showed linear
hyperintensities within N.N.’s white matter. However, according to Dr. Wiznitzer, the
hyperintensities were indications of “terminal zones” of immature myelin. Id. According
to Dr. Wiznitzer, this terminal myelination was “a normal finding in individuals between
16 months up through the second decade of life.” Id. To support his argument that the
hyperintensities represented a normal developmental variant instead of a loss of tissue,
Dr. Wiznitzer presented MRI images from children, including a six-year-old, appearing
in the medical literature that are considered “normal” and which feature what he
characterized as the same type of linear hyperintensities identified by Dr. Shuman as
abnormal. Id. (citing Trial Ex. 4, Welker and Patton, Assessment of Normal Myelination
with Magnetic Resonance Imaging, Seminars in Neurology Vol. 32 (2012) [hereinafter
“Assessment of Normal Myelination”]). Dr. Shuman countered that, at age eleven, N.N.
was too old at the time of his 2011 MRI to have exhibited immature myelination. Dec. at
16. Dr. Shuman initially testified that images of terminal myelination in babies is “a
smooth anatomic phenomenon of age” and is “limited to the first year of life.” Dec. at
16.
The special master found that Dr. Wiznitzer’s opinion was more persuasive. Dec.
at 17. The special master explained that he found Dr. Wiznitzer’s explanation that the
hyperintensities were a “normal developmental variant known as terminal myelination”
was “coherent” and “supported by medical literature.” Id. Specifically, the special
master found that Dr. Wiznitzer’s testimony was consistent with the statement in
Assessment of Normal Myelination that “small areas of hyperintensity are considered to

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be a normal developmental variant in children and at times are even identifiable in the
young adult population.” Dec. at 16 (quoting Assessment of Normal Myelination at 11)
(emphasis added in special master’s opinion). The special master found that Dr. Shuman,
on the other hand, did not back up his opinion that the degree of hyperintensity exhibited
in N.N.’s 2011 MRI would not be age appropriate for an eleven-year-old with any
published medical literature. Id. at 16-17. The special master found that Dr. Shuman’s
opinion “seemed, if not completely at odds with the medical literature in the record, at the
very least less consistent with it,” and therefore found Dr. Shuman’s explanation for the
presence of the trigonal hyperintensities less persuasive. Dec. at 17.
b. Bilateral hyperintensity of the hippocampi
Dr. Shuman testified that Exhibits 43-A and 43-B “show bilateral hyperintensity
of the posterior portions of hippocampi.” Id. Dr. Shuman testified that this finding was
significant because the hippocampus is a “very prominent part of the limbic system” and
as such, is “a very prominent site of attack in encephalitis, especially limbic
encephalitis.” Id.
Dr. Wiznitzer testified that, in his experience in his own practice, the “classic”
pattern of limbic encephalitis would be shown as a hyperintensity in the anterior of the
hippocampus. Id. at 17-18. In response, Dr. Shuman pointed that the medical literature
Dr. Wiznitzer used to illustrate his testimony regarding “classic” pattern of encephalitis
does not exclude hyperintensities in the posterior of the hippocampus. Id. at 18. Instead,
Dr. Shuman pointed out, and the special master acknowledged, that the article speaks of
inflammation “anywhere in the mediotemporal lobe” as evidence of limbic encephalitis,

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and does not at any point limit its discussion by using the modifying “anterior”
descriptor. Id.
In addition to arguing that Dr. Shuman’s interpretation of the MRI was not
consistent with limbic encephalitis, Dr. Wiznitzer also argued that the posterior
hyperintensity Dr. Shuman identified was “an ‘artifact’ of the MRI process and was not
an abnormality at all.” Id. at 18. According to Dr. Wiznitzer, a true finding of
abnormality would look “fluffy” or have an “irregular contour” whereas this image is
“like a little peg.” Id. Dr. Wiznitzer cited several examples of MRIs containing artifacts
to support this argument. Id. at 19. Dr. Shuman countered that the hyperintensity was
unlikely to be an artifact because it was visible in images of different planes in N.N.’s
2011 MRI study, and also visible in N.N.’s 2005 MRI study. Id.
The special master agreed with Dr. Wiznitzer. With respect to the dispute over
whether hyperintensities in the posterior hippocampus could signify prior limbic
encephalitis, the special master found that “[t]his ambiguity alone might be indication
enough that Petitioners have failed to meet their burden on this issue.” Id. at 19.
However, the special master went on to find that, “it would appear that the anterior
hyperintensity shown on N.N.’s MRI may be no indication of any abnormality at all.” Id.
The special master explained that Dr. Wiznitzer’s opinion “that it is nothing more than an
artifact of the MRI process is compelling, particularly in light of the multiple examples
he provides from medical literature.” Id. Dr. Shuman, on the other hand, had not
“substantiated his assertion that MRI artifacts are transient, unreproducible, or limited to
a single plane” with citations to medical literature. Id. at 18-19.

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c. Hyperintensity in the ventricle lining
Dr. Shuman testified that Exhibit 43-A showed “signal intensity around the lining
of the lateral ventricle.” Id. at 20. He argued that this finding was significant because the
lateral ventricle “is a favored spot for scarring in any kind of inflammatory process.” Id.
However, in response to Dr. Wiznitzer’s testimony (with citations to medical literature)
that this type of brightness along the ventricular wall is known as “anterior cap” and is
considered normal, Dr. Shuman characterized his argument on this point as “a throw
away.” Id. Dr. Shuman acknowledged that hyperintensity of the ventricle lining is a
normal finding “to a degree,” but argued that the thickness in N.N.’s case was pathologic
for a child of N.N.’s age. Id. However, because Dr. Shuman was not able to quantify
what a normal degree of thickness would be, the special master found that “even if this
type of hyperintensity were abnormal, there is an insufficient basis to conclude that it is
evidence of encephalitis in particular.” Id.
d. Enlarged ventricles
Dr. Shuman compared Exhibit 44-A, from N.N.’s 2011 MR study, with Exhibit
44-B, an image showing the same region of the brain from N.N.’s 2005 study. Id. Dr.
Shuman testified that a comparison of these two images showed that the ventricles appear
larger in the 2011 image as they did in the 2005 image. Id. Dr. Shuman testified that the
2011 images showed ventricles that are “huge” for a child N.N.’s age, and opined that
tissue loss was the only explanation for the increase in size. Id. at 21. Dr. Wiznitzer
countered that ventricle growth is normal in children as they age. Id.

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The special master found that, though the petitioners showed that the lateral
ventricles had grown over time, the petitioners had not demonstrated the medical
significance of that change. Id. The special master also concluded that the petitioners
had not established that N.N.’s were enlarged to the point that their size was evidence of
a pathology. Id.
e. Hyperintensity in the fornices
Dr. Shuman testified the images from N.N.’s MRI studies included
hyperintensities in the body of the fornices, which he concluded was indicative of
scarring. Id. Dr. Wiznitzer countered that the hyperintensities in the fornix that Dr.
Shuman saw as evidence of scarring was actually another example of an “anterior cap,”
which Dr. Wiznitzer testified also explained the hyperintensities in the ventricle lining.
Id. Dr. Wiznitzer argued that the brightness Dr. Shuman had identified as the fornix was
actually the “thin rim of the ventricle wall.” Id. Dr. Shuman acknowledged that some
degree of hyperintensity in the fornix could be a normal finding, but again argued that
such a finding would not be appropriate for N.N. given his age, arguing that the relevant
zone of the brain is very thin at birth but becomes “thicker and tougher with each
decade.” Id. at 22.
The special master found that Dr. Shuman “acknowledges that N.N.’s MRI should
demonstrate some level of hyperintensity in the region of the fornix.” Id. The special
master found that Dr. Shuman “failed to offer any normative values from which to judge
the appropriate” degree hyperintensity, and therefore could not demonstrate a pathology.
Id.

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2. The special master determined that Drs. Bauza and Hewell’s
opinions were not entitled to significant weight
N.N.’s medical records also included the finding of radiologist Dr. Hewell that
N.N.’s 2005 MRI study was normal, and Dr. Bauza’s report stating that N.N.’s 2011 MRI
study was consistent with a prior encephalitis. The petitioners relied heavily on the
opinion of Dr. Bauza, the neuroradiologist who supervised N.N.’s 2011 MRI study and
provided the initial interpretation of those scans.6 The petitioners argued that Dr. Bauza,
by virtue of being a neuroradiologist, was better qualified than Dr. Shuman or Dr.
Wiznitzer to interpret N.N.’s MRI results. In his report, Dr. Bauza found that N.N.’s
MRIs exhibited hyperintensities in the hippocampus and hypothalamus regions, and
concluded that these findings were “in keeping with the patient’s previous history of
encephalitis.” Pet. Mem. 5. Dr. Bauza did not testify at the hearing.
The special master found that, in light of the other evidence in this case, Dr. Bauza
and Dr. Hewell’s reports were “not entitled to any great weight in resolving the case.”
Dec. at 23. The special master reasoned that the fact that “two additional physicians have
produced conflicting findings is not in itself enlightening with regard to the question of
whether Dr. Shuman or Dr. Wiznitzer has presented superior evidence explaining why
one interpretation is correct while another is wrong.” Id. The special master reasoned
that the evidence in this case made it “quite clear” that “qualified experts can and do
differ on questions of MRI interpretation.” Id. In addition, the special master found that
6 Dr. Bauza did not testify at the hearing, nor does the record include any significant information
regarding his training and credentials.

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while the experts in this case “reported their ultimate findings, but have submitted their
underlying reasoning to the scrutiny of the court, through extensive reports and
testimony,” Dr. Bauza and Dr. Hewell did “not provide any insight as to the reasoning
behind” their interpretations. Id. at 25. The special master determined that “these two
additional reports do little more than further highlight the disagreement between Drs.
Shuman and Wiznitzer, without providing any further elucidation of the issues involved
in MRI interpretation as explained by the competing experts in this case.” Id. Therefore,
the special master found that Drs. Bauza and Hewell’s reports were “substantially
outweighed by the testimony of those experts who testified fully, Drs. Wiznitzer and
Shuman.” Id.
In addition, the special master rejected petitioners’ argument that Dr. Bauza was
N.N.’s treating physician, and as such, that his opinion should be given particular weight
under Federal Circuit case law. N.N. was referred to Dr. Bauza by his treating physician,
however, the special master found that the petitioners’ expert had acknowledged that “the
decision to do another MRI in 2011 was made at Dr. Shuman’s behest, after he had begun
working with Petitioners’ counsel on this case.” Dec. at 24. Therefore, according to the
special master, “even if Dr. Bauza was not hired for the particular purpose of testifying,
and even if the referral technically came from N.N.’s treating physician, Dr. Fischer, Dr.
Shuman’s testimony indicates that Dr. Bauza’s MRI study arose not for treatment
purposes, but for furtherance of the instant claim.” Id. The special master also noted
that, in his testimony, “Dr. Shuman indicated that he believed [petitioners’ counsel] was
in direct contact with Dr. Bauza.” Id. at 24 (citing Tr. 116). The special master felt that

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the circumstances were “enough to cast doubt, not on Dr. Bauza’s integrity, but on his
neutrality and on his purpose relative to this case.” Id. at 24.7 Therefore, the special
master concluded, Dr. Bauza did not qualify as a “treating physician” and his opinion was
not entitled to any particular deference on those grounds.
II. STANDARD OF REVIEW UNDER THE VACCINE ACT
A. Recovery under the Vaccine Act
Congress enacted the Vaccine Act in order to create “a federal no-fault
compensation scheme under which awards were to ‘be made to vaccine-injured persons
quickly, easily, and with certainty and generosity.’” Paluck v. Sec’y of Health and
Human Servs., 786 F.3d 1373, 1378 (Fed. Cir. 2015) (quoting H.R.Rep. No. 99-908, at 3,
1986 U.S.C.C.A.N. at 6344). Under the Vaccine Program, there are two means of
recovery: claims based on injuries listed in the Vaccine Injury Table (“Table”) and claims
based on injuries not listed in the Table, known as off-Table claims. In a Table claim, a
petitioner is granted a presumption of causation if he or she shows that he or she received
a vaccine listed in the Table, that he or she suffered an injury listed in the Table, and that
the injury occurred within the prescribed time period. See Andreu v. Sec’y of Health and
Human Servs., 569 F.3d 1367, 1374 (Fed. Cir. 2009) (describing Table cases). In an off-
Table case, a petitioner who received a vaccine listed in the Table but suffered an injury
7 The special master also found that “Dr. Bauza’s report “does not completely support Dr.
Shuman’s viewpoint.” Id. The special master noted that while “Dr. Shuman believes that N.N.’s
MRI shows enlarged ventricles, Dr. Bauza did not make that finding. . . . Dr. Shuman also
disagreed with Dr. Bauza’s opinion that the asymmetrical size of N.N.’s hippocampi is a normal
variant.” Id.

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not listed in the table does not receive a presumption of causation, and instead must prove
causation by a preponderance of the evidence. See Moberly v. Sec’y of Health and
Human Servs., 592 F.3d 1315, 1321 (Fed. Cir. 2010) (describing off-Table cases).
When, as in this case, the petitioner alleges an injury listed on the Vaccine Injury
Table, the petitioner has the burden of proving by a preponderance of evidence that the
injury meets the criteria of the Table injury, and that the Table injury occurred within the
prescribed time limits. de Bazan v. Sec’y of Health and Human Servs., 539 F.3d 1347,
1351 (Fed. Cir. 2008) (citing Grant v. Sec’y of Health and Human Servs., 956 F.2d 1144,
1146-47 (Fed. Cir. 1992)). A plaintiff that can make such a showing has established a
prima facie case. de Bazan, 539 F.3d at 1351. The petitioner will then be entitled to
recover “unless the government shows by a preponderance of the evidence that the . . .
injury is due to factors unrelated to the administration of the vaccine . . . .” Grant, 956
F.2d at 1146-47 (quoting 42 U.S.C. § 300aa-13(a)(1)(B)).
B. Standard of Review of Special Master’s Opinion
This court has jurisdiction to review the decisions of a special master in a Vaccine
Act case upon a motion from the petitioner. 42 U.S.C. § 300aa-12(e)(2). When
reviewing a special master’s decision, the court may:
(A) uphold the findings of fact and conclusions of law of the special
master and sustain the special master’s decision,
(B) set aside any findings of fact or conclusion of law of the special
master found to be arbitrary, capricious, an abuse of discretion, or
otherwise not in accordance with law and issue its own findings of
fact and conclusions of law, or
(C) remand the petition to the special master for further action in
accordance with the court’s direction.

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Id. at § 300aa–12(e)(2)(A)-(C). Failure to consider an important piece of evidence may
be grounds for reversal or remand. See Shapiro v. Sec’y of Health and Human Servs.,
101 Fed. Cl. 532, 541 (2011) (finding that a special master does not have discretion to
“ignore entirely significant evidence that contradicts a finding.”). However, in
determining whether a special master’s decision should be set aside or remanded, the
court does not “reweigh the factual evidence,” “assess whether the special master
correctly evaluated the evidence,” or “examine the probative value of the evidence or the
credibility of the witnesses.” Lampe v. Sec’y of Health and Human Servs., 219 F.3d
1357, 1360 (Fed. Cir. 2000) (internal quotation marks omitted) (quoting Munn, 970 F.2d
863, 871(Fed. Cir. 1992)).
If the special master “has considered the relevant evidence of record, drawn
plausible inferences and articulated a rational basis for the decision,” then “reversible
error is extremely difficult to demonstrate.” Id. at 1360 (internal quotation marks
omitted) (quoting Hines ex rel. Sevier v. Sec’y of Health and Human Servs., 940 F.2d
1518, 1528 (Fed. Cir. 1991)). A special master is accorded “great deference” when the
case depends on the special master’s evaluation of an expert witness’s credibility.
Cedillo v. Sec’y of Health and Human Servs., 617 F.3d 1328, 1347 (Fed. Cir. 2010).
Consequently, when the special master has “clearly articulated his reasons for
discrediting [an] expert’s opinion,” the Federal Circuit has found that the special master’s
“‘credibility determinations are virtually unreviewable.’” Id. (quoting Hanlon v. Sec’y
of Health and Human Servs., 191 F.3d 1344, 1349 (Fed. Cir. 1999)).

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 19 of 29
III. DISCUSSION
The petitioners argue that it was arbitrary and capricious for the special master to
disregard Dr. Bauza’s report of N.N.’s 2011 MRI scan. Because the correct
interpretation of the 2011 MRI was critical to this case, the petitioners argue, it was
reversible error to ignore Dr. Bauza’s report. The petitioners assert that the special
master’s opinion was unreasonable because the special master failed to consider two
reasons why Dr. Bauza’s opinion should be given more weight than Dr. Shuman. First,
petitioners argue that as a neuroradiologist, Dr. Bauza was more qualified than the other
experts who testified regarding N.N.’s MRI results. Second, petitioners argue that Dr.
Bauza’s opinion should have been given particular weight because he was a “treating
physician” and, under precedent in this circuit, should be given additional consideration
on that basis.
The respondent acknowledges that the special master “declined to give any
significant weight to Dr. Bauza’s interpretation of the 2011 MRI scan.” Gov’t Resp. 7.
However, the government argues that the treatment that the special master gave to Dr.
Bauza’s report was sufficient, and notes that under the Vaccine Act, a special master is
not bound by any particular medical record. The government asserts that the special
master rationally found that Dr. Bauza should not be considered a treating physician
because the decision to perform the 2011 MRI was motivated by this litigation rather than
a need for clinical treatment.
The court agrees with the government that the special master’s treatment of Dr.
Bauza’s report was not arbitrary or capricious. The special master gave a careful and

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 20 of 29
detailed analysis of the medical issues involved in this case, and found that petitioners
had not met their burden in light of relevant medical literature contradictory to their
position. Further, the special master articulated a reasonable explanation for his decision
not to rely on Dr. Bauza’s report. The petitioners make several arguments in support of
their position that Dr. Bauza was per se a more credible witness. However, as discussed
below, none of plaintiff’s arguments are sufficient to show that the special master’s
decision to rely upon expert witnesses instead of Dr. Bauza’s report was arbitrary and
capricious. By arguing that Dr. Bauza’s opinion should have been more persuasive than
the experts who testified in this case, the petitioners are effectively asking this court to re-
weigh the evidence and re-make credibility determinations, which this court is not
permitted to do. These determinations are properly within the special master’s discretion,
and the court will not disturb his findings. Lampe, 219 F.3d at 1360 (in reviewing a
special master’s decision, the court does not “examine the probative value of the evidence
or the credibility of the witnesses.”)
A. Petitioners Have Not Demonstrated that Dr. Bauza is Entitled to
Deference as a Neuroradiologist
Petitioners argued that, as a neuroradiologist, Dr. Bauza is better qualified than Dr.
Wiznitzer or Dr. Shuman (both pediatric neurologists) and Dr. Hewell (a radiologist) to
interpret an MRI study. Therefore, petitioners argue, Dr. Bauza’s opinion should carry
more weight than any of the other doctors who gave evidence in this case. Petitioners
state that Dr. Bauza is a “board certified neuroradiologist—a specialist who has studied
and worked in a specialized residency program developing expertise in interpreting MRI

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 21 of 29
scans and other neuroimaging studies.” Pet. Mot. 4. According to petitioners, “[b]oth
Dr. Shuman and Dr. Wiznitzer testified that a board certified neuroradiologist was better
qualified to interpret a[n] MRI scan than a pediatric neurologist.” Id. at 10 (citing Tr. 36-
30, 122-23, 222). Petitioners further state that, during the hearing, “Dr. Wiznitzer
testified that he relied on neuroradiologists to interpret his patient[s’] MRI scans.” Id.
(citing Tr. 222).
The court finds that the record does not contain any significant evidence that Dr.
Bauza’s credentials make him the most reliable witness, and the evidence that does exist
in the record regarding the relative qualifications of a neuroradiologist as compared to a
pediatric neurologist is not as decisive as petitioners suggest. On cross-examination, Dr.
Wiznitzer testified that, in his clinical practice, the MRI scans he orders are read by a
neuroradiologist because, Dr. Wiznitzer explained, “that is [the neuroradiologist’s] job in
the hospital.” Tr. 222. When asked if a neuroradiologist’s reading of an MRI is
generally more reliable than the interpretation by a pediatric neurologist, Dr. Wiznitzer
answered, “[w]hen the neuroradiologist’s interpretation makes sense, yes.” Id. However,
Dr. Wiznitzer also testified that he does not always agree with the neuroradiologist’s
findings, particularly in the context of adult neuroradiologists interpreting children’s MRI
findings, explaining that neuroradiologists sometimes have to be “redirected towards a
more accurate interpretation of what the neuroimaging actually shows.” Tr. 214.
Therefore, the court cannot say that it was unreasonable for the special master not to treat
Dr. Bauza as the most qualified witness simply because he is a neuroradiologist

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Further, even assuming that, all things being equal, “a board certified
neuroradiologist was better qualified to interpret a[n] MRI scan than a pediatric
neurologist,” Pet. Mot. 10, the record still does not contain any evidence that Dr. Bauza
would be the best person to interpret this MRI in this particular case. Dr. Bauza did not
testify at the hearing to explain his conclusions or qualifications. Unlike Dr. Shuman and
Dr. Wiznitzer, who submitted extensive documentation of their credentials, including
education, certificates, academic work, and clinical experience, we know almost nothing
about Dr. Bauza’s training and experience. In his opinion, Special Master Hastings
carefully reviewed Dr. Shuman and Dr. Wiznitzer’s respective training, clinical
experience, certifications, and academic contributions. Though each side argued that its
respective expert was better qualified expert to interpret an MRI study, the special master
rejected both sides’ arguments, finding that neither expert was inherently more qualified:
Ultimately, I am faced with two qualified experts—both pediatric
neurologists—with different strengths. While Dr. Shuman is a pathologist
with a certification in neuroimaging, Dr. Wiznitzer is a current practitioner
with up-to-date clinical skills in utilizing neuroimaging not demonstrated
by Dr. Shuman. I cannot say that one is inherently more qualified than the
other.
Dec. at 23. In contrast, the record includes no such documentation of Dr. Bauza’s
credentials, training, or experience.
Importantly, there is nothing in the record regarding Dr. Bauza’s experience in
pediatric neuroradiology. A significant question in this case is whether the trigonal
hyperintensities observed in N.N.’s MRI scan were a normal developmental variant for a
person his age, or whether a normal eleven-year-old brain would not exhibit

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 23 of 29
hyperintensities of that nature. While Dr. Shuman and Dr. Wiznitzer both have
documented experience in developmental neurology, we do not know whether Dr. Bauza
does or not. In addition, the petitioners do not give any citation for their assertion that
Dr. Bauza “has studied and worked in a specialized residency program developing an
expertise in interpreting MRI scans,” Pet. Mem. 4, or that he is “highly regarded” in his
field, id. at 15. The court does not suggest that the petitioners are not accurately
representing Dr. Bauza’s background, but this information gap meant that the special
master did not have a basis to find on the record that Dr. Bauza was particularly
qualified.8 Therefore, the court cannot fault the special master for not accepting
petitioners’ position that Dr. Bauza’s credentials alone make him the most qualified
witness when the record does not contain evidence supporting such a finding.
B. Petitioners Have Not Demonstrated that Dr. Bauza is Entitled to
Deference as N.N.’s Treating Physician
The petitioners also assert that the special master’s determination that Dr. Bauza
was not N.N.’s “treating physician” was reversible error. The “treating physician”
designation is important because the Federal Circuit has recognized that medical records
of treating physicians may be particularly probative in vaccine cases because “treating
physicians are likely to be in the best position to determine whether ‘a logical sequence
of cause and effect show[s] that the vaccination was the reason for the injury.’”
Capizzano v. Sec’y of Health & Human Servs., 440 F.3d 1317, 1326 (Fed. Cir. 2006)
8 The special master likewise did not have significant evidence on the record to evaluate Dr.
Hewell’s expertise as compared to Dr. Shuman and Dr. Wiznitzer.

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 24 of 29
(quoting Althen v. Sec’y of Health and Human Servs., 418 F.3d 1274, 1280 (Fed. Cir.
2005)). Therefore, according to petitioners, the special master should have given Dr.
Bauza additional consideration because, unlike the experts retained to testify in this case,
Dr. Bauza actually treated N.N. in a clinical capacity. Petitioners argue that there was no
reasonable basis not to find that Dr. Bauza was a treating physician, and spend a
significant portion of their memorandum refuting the special master’s finding that “Dr.
Bauza’s MRI study arose not for treatment purposes, but for furtherance of the instant
claim,” and therefore, according to the special master, “[p]etitioners’ characterization of
Dr. Bauza as a ‘treating physician’ is somewhat misleading.” Dec. at 24. However,
whether or not the special master correctly concluded that Dr. Bauza was retained for
purposes of furthering the litigation, the petitioners’ argument that Dr. Bauza should have
been given particular weight as a treating physician fails.
The reasoning underlying the finding that opinions of treating physicians should
be given particular weight does not apply when, as here, the treating physician only saw
the patient after the injury and based his opinion on the same evidence as relied upon by
the retained experts. Capizzano and similar cases were decided in the context of proving
causation under the Althen test for off-Table injuries, which requires a petitioner to
demonstrate that the vaccine was the cause of his or her injury, see Althen, 418 F.3d at
1279-80. In that connection, the court found that a treating physician who was familiar
with the patient both before and after the alleged vaccine injury is likely to be in a better
position than an expert retained after the fact with respect to the question of whether there
was “‘a logical sequence of cause and effect show[s] that the vaccination was the reason

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 25 of 29
for the injury.’” Capizzano, 440 F.3d at 1326 (quoting Althen, 418 F.3d at 1280). In
contrast to treating physicians who had observed the patient as the condition unfolded,
retained experts were limited to a review of the records after the fact. Consequently,
treating physicians’ opinions are often regarded as “quite probative” with respect to the
causation prong under Althen. Andreu, 569 F.3d at 1375.
In this case, however, Dr. Bauza does not have a similar advantage over the
experts who testified in this case, as he treated N.N. only after the alleged vaccine injury
occurred. Like the experts who testified in this case, Dr. Bauza based his conclusions off
the MRI scans and not on any interaction with the patient. In Dobrydnev v. Sec’y of
Health and Human Servs., the Federal Circuit affirmed the special master’s decision to
credit other experts over Dr. Bell, the only testifying physician who had examined the
petitioner. 566 F. App’x 976, 982-83 (Fed. Cir. 2014), reh’g denied (Aug. 20, 2014),
cert. denied sub nom. Dobrydnev v. Burwell, 135 S. Ct. 1560 (2015). The court found
that the fact that Dr. Bell had examined the petitioner did not “transform him into a
treating physician such that increased deference to his opinion was required . . . .” Id. at
983. It is true that the examining physician in Dobrydnev was a retained expert, while the
parties in this case dispute whether or not petitioners sought Dr. Bauza’s services for
treatment purposes or to further the instant litigation. However, Dobrydnev still shows
that there is nothing talismanic about treating a patient that affords special weight to a
doctor’s opinion when the treating physician has no particular informational or other

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 26 of 29
advantage over other experts who relied upon the same evidence.9 In this case,
petitioners used Dr. Bauza as an expert witness, not as a treating physician. Therefore,
the special master was not required to give Dr. Bauza’s report any additional deference.
C. The Special Master Considered the Merits of Dr. Bauza’s Opinion
In arguing that the special master improperly disregarded Dr. Bauza’s opinion,
petitioners note that, in the close to nine pages of the special master’s decision discussing
the correct interpretation of N.N.’s MRI scans, “[a]t no point in the analysis does [the
special master] even mention Dr. Jose Bauza’s interpretation of N.N.’s 2011 MRI scan.”
Pet. Mem. 9. The Vaccine Act requires a special master to “consider . . . any diagnosis,
conclusion, medical judgment, or autopsy or coroner’s report which is contained in the
record regarding the nature, causation, and aggravation of the petitioner’s” condition, as
well as “the results of any diagnostic or evaluative test which are contained in the record
and the summaries and conclusions.” 42 U.S.C. § 300aa-13(b)(1)(A)-(B). However,
medical records are “not binding on the special master or the court,” and in “evaluating
the weight to be afforded to any such” medical evidence, the special master “shall
consider the entire record and the course of the injury, disability, illness, or condition.”
42 U.S.C. § 300aa-13(b)(1)(A)-(B).
9 Further, in their discussion of Dr. Bauza’s role as N.N.’s treating physician, the petitioners
neglect to discuss the opinion of Dr. Hewell that N.N.’s 2005 MRI was normal. Dr. Hewell was
at least as much N.N.’s treating physician as Dr. Bauza. As discussed above, it was reasonable
for the special master to find that the mere fact that Dr. Bauza is a neuroradiologist does not
automatically make Dr. Bauza’s opinion more credible. Therefore, if Dr. Bauza’s opinion that
N.N.’s 2011 MRI scans were abnormal is entitled to particular deference simply because Dr.
Bauza treated N.N., then Dr. Hewell’s opinion that N.N.’s 2005 MRI was normal should also be
entitled to the same level of special consideration.

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 27 of 29
Although the section of the special master’s decision evaluating the MRI results
does not mention Dr. Bauza by name, the special master did thoroughly evaluate the
medical evidence from the 2011 MRI study which Dr. Bauza had opined were consistent
with encephalitis. Dr. Bauza made two findings that he believed were indicative of
previous encephalitis: hyperintensities in the peritrigonal region and bilateral
hyperintensities in the hippocampus. These were the first two of the five findings that
Dr. Shuman identified as indicative of encephalitis, and the issues that the special master
spent the longest time discussing in his opinion. In his decision, the special master noted
that Dr. Bauza had made both of these findings, demonstrating that the special master had
considered and understood Dr. Bauza’s opinion rather than simply disregarding it. Dr.
Bauza’s report did not include any findings that were not addressed in Dr. Shuman’s
report; therefore, the special master did in fact evaluate the merits of Dr. Bauza’s report.
To analyze Dr. Bauza’s opinion that hyperintensities in the peritrigonal region and
bilateral intensity in the hippocampus were abnormal for a second time would have been
redundant.
Ultimately, the special master found that Dr. Wiznitzer was the more reliable
witness because Dr. Wiznitzer “present[ed] coherent and detailed testimony that was
supported by specific references to medical literature.” Dec. at 23. Though not required
under the Vaccine Act, the Federal Circuit has found that citations to medical literature
are valuable tools in assessing expert testimony. Andreu, 569 F.3d at 1379 (finding that
though “a claimant need not produce medical literature . . . where such evidence is
submitted, the special master can consider it in reaching an informed judgment . . . .”).

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 28 of 29
The special master carefully analyzed the complicated scientific principles in this case,
and took care to correctly represent and analyze each expert’s extensive testimony and
reports. Under the circumstances, it was perfectly reasonable for the special master to
find that the expert whose testimony was supported by medical literature was more
persuasive.
In a supplemental brief, petitioners argued that Paluck v. Sec’y of Health and
Human Servs., which the Federal Circuit decided while this case was pending, supports
their argument that the special master’s decision should be reversed for his failure to give
weight to Dr. Bauza’s opinion. In Paluck, the petitioner relied upon two MRI studies
which his radiologist and physician had interpreted as indicating that his neurological
decline began shortly after his vaccination. Paluck, 786 F.3d at 1385-86. The court
found that the special master had articulated “no reasonable justification for discounting
[the reports’] significance.” Id. at 1385.
In contrast, the special master in this case did not discount the significance of
N.N.’s MRI studies. To the contrary, the special master correctly identified the
interpretation of the MRIs as the most important issue in this case and spent the bulk of
his opinion carefully considering the experts’ differing interpretations of the MRI. As
discussed above, the special master fully analyzed the substance of Dr. Bauza’s findings
because Dr. Bauza’s opinion was coextensive with Dr. Shuman’s. Therefore, the court
finds that the special master’s treatment of Dr. Bauza’s report was in conformity with the
Vaccine Act’s instruction to consider medical judgments in light of the entire record.

Case 1:07-vv-00810-NBF Document 111 Filed 08/19/15 Page 29 of 29
IV. CONCLUSION
As the special master noted, “qualified experts can and do differ on the questions
of MRI interpretation.” Dec. at 25. Because the special master carefully considered and
weighed all of the evidence presented in this case, his decision to credit Dr. Wiznitzer’s
opinion over Dr. Bauza or Dr. Shuman is a credibility determination that is “virtually
unreviewable.” Cedillo, 617 F.3d at 1347 (quoting Hanlon, 191 F.3d at 1349).
Petitioners have not demonstrated that the special master’s treatment of Dr. Bauza’s
report was arbitrary and capricious. Therefore, for the reasons stated above, the court
now DENIES petitioners’ motion and AFFIRMS the opinion of the special master.
IT IS SO ORDERED.
s/Nancy B. Firestone
NANCY B. FIRESTONE
Judge