Pamela Doyle on behalf of Katelyn v. HHS - MMR, idiopathic thrombocytopenic purpura (ITP) (2010)

On June 7, 2005, Pamela Doyle, on behalf of her minor daughter Katelyn, filed a petition for compensation under the National Vaccine Injury Compensation Program. Katelyn, born October 10, 2001, received the MMR and varicella vaccines on October 16, 2002.

The petition alleged that the MMR vaccine caused Katelyn to develop idiopathic thrombocytopenic purpura (ITP), a bleeding disorder where the immune system attacks platelets. The case was ultimately denied, with the court affirming the Special Master's decision that Katelyn's ITP was not caused by the MMR vaccination.

Katelyn was seen at Wake County Human Services on April 15, 2003, where no abnormalities were found. Her mother reported concerns on July 8, 2003, noting multiple small reddish-purple bruises in various stages of healing on Katelyn's arms, legs, and trunk.

While Katelyn had always bruised easily since she began walking, her mother was more concerned due to a purplish knot on her side. Blood work on July 9, 2003, revealed a platelet count of 19,000, leading to Katelyn's admission to the University of North Carolina Children's Hospital.

She was diagnosed with ITP, characterized by new-found thrombocytopenia and increased bruising. Her condition persisted, and she was later diagnosed with chronic ITP, although her ITP is currently in remission.

Petitioner's expert, Dr. S.

Gerald Sandler, acknowledged that the generally accepted interval between the MMR vaccine and ITP onset is about six weeks. He proposed that Katelyn had a rare, chronic, and insidious form of ITP that lingered below the surface before obvious bruising appeared.

He tied the illness to the MMR vaccine, citing the absence of pre-vaccination thrombocytopenia, no maternal ITP antibody transfer, and a diagnosis of chronic ITP within 38 weeks post-vaccination. Respondent's expert, Dr.

James Nachman, disagreed, testifying that Katelyn's ITP was more acute than chronic and that the onset occurred six to nine months after immunization. Dr.

Nachman stated he was unaware of any medical literature linking the MMR vaccine to ITP with an onset 26 to 38 weeks post-vaccination. Chief Special Master Gary J.

Golkiewicz denied compensation on August 28, 2009, finding Dr. Nachman's testimony more persuasive.

He concluded that petitioner had not established an insidious chronic ITP model in children, nor adequately explained how such a model would arise or how it tied to the medical records. The records did not document post-vaccination bleeding or bruising until many months after immunization, and Dr.

Sandler could not definitively state whether an unobserved insidious process began before or after the MMR vaccine. Judge Allegra affirmed this decision on March 19, 2010, holding that the Special Master properly applied the legal standards, including the Althen test for causation-in-fact, and reasonably found that the petitioner failed to prove a proximate temporal relationship between the vaccination and the ITP onset.

No compensation was awarded. Petitioner's counsel was not named in the provided text.

Respondent's counsel was not named in the provided text.