Duane Morgan v. HHS - Influenza, brachial neuritis and adhesive capsulitis (2023)
Case summary [AI summaries can sometimes make mistakes]
On February 26, 2016, Duane Morgan filed a petition for compensation under the National Vaccine Injury Compensation Program, alleging that an intradermal influenza vaccine administered on October 22, 2014, caused him to suffer from brachial neuritis and adhesive capsulitis. Mr.
Morgan, who was 60 years old at the time of vaccination, reported experiencing pain, redness, and swelling at the injection site within days of the vaccination, which progressed to severe pain, weakness, and numbness in his left arm and hand. His treating physicians, including orthopedist Dr.
Russell Huffman and neurologist Dr. Eric Zager, diagnosed him with brachial neuritis (also known as Parsonage-Turner Syndrome) and adhesive capsulitis, finding a causal relationship to the vaccine.
Petitioner's experts, Dr. Huffman, Dr.
Vera Byers (immunologist), and Dr. Maria Fangchun Chen (neurologist), presented medical theories explaining how the intradermal vaccine could trigger an inflammatory response leading to nerve damage and subsequent adhesive capsulitis.
They argued that the intradermal administration, due to the skin's rich immune cell network, could induce a heightened inflammatory cascade, potentially leading to vasculitis and nerve damage. Respondent, represented by Ryan D.
Pyles of the U.S. Department of Justice, argued that Mr.
Morgan's condition was more likely caused by his long-standing diabetes, presenting expert opinions from neurologist Dr. Brian Callaghan and immunologist Dr.
S. Mark Tompkins.
Respondent's experts suggested that Mr. Morgan suffered from diabetic cervical radiculoplexopathy and that his adhesive capsulitis was also likely diabetes-related.
They contended that the evidence for diabetes as the cause outweighed the evidence for vaccination. The Special Master, Thomas L.
Gowen, reviewed the extensive medical records and expert reports. He found that Mr.
Morgan's medical records and expert testimony established a logical sequence of cause and effect, a sound medical theory, and a proximate temporal relationship between the vaccine and his injury, satisfying the Althen criteria for off-Table injuries. The Special Master concluded that Mr.
Morgan's symptoms and clinical course were more consistent with vaccine-induced brachial neuritis and adhesive capsulitis than with diabetic neuropathy. Therefore, the Special Master ruled that Duane Morgan was entitled to compensation, with a separate order to be issued for damages.
Theory of causation
Petitioner Duane Morgan, a 60-year-old male, received an intradermal influenza vaccine on October 22, 2014, and subsequently developed brachial neuritis and adhesive capsulitis. Petitioner's experts, Drs. Huffman, Byers, and Chen, proposed that the intradermal vaccine administration, due to the skin's dense network of antigen-presenting cells and unique microvascular/lymphatic structures, elicits a heightened innate immune response with rapid upregulation of pro-inflammatory cytokines (e.g., TNF-α, IL-1β). This inflammatory cascade can lead to vasculitis affecting the nerves of the brachial plexus, causing brachial neuritis. They further posited that the pain and inflammation associated with brachial neuritis could lead to secondary adhesive capsulitis. This theory was supported by medical literature on intradermal vaccination mechanisms and case reports of vaccine-associated brachial neuritis. Respondent's experts, Drs. Callaghan and Tompkins, argued that Mr. Morgan's condition was caused by underlying diabetes, specifically diabetic cervical radiculoplexopathy, and that the vaccine was not the cause. They contended that diabetic neuropathy is a more likely explanation and that the evidence for vaccination-induced brachial neuritis was insufficient. Special Master Gowen found that petitioner established by preponderant evidence: (1) a reputable medical theory that the intradermal flu vaccine can cause brachial neuritis via an inflammatory cascade and vasculitis; (2) a logical sequence of cause and effect, noting Mr. Morgan's symptom onset shortly after vaccination, his clinical presentation consistent with brachial neuritis rather than diabetic neuropathy, and the failure of alternative explanations to account for his condition; and (3) a proximate temporal relationship, with symptoms appearing within days of vaccination. The Special Master ruled in favor of entitlement, finding the vaccine to be the cause of Mr. Morgan's brachial neuritis and adhesive capsulitis. Attorneys for petitioner were Paul R. Brazil and Muller Brazil, LLP. Attorney for respondent was Ryan D. Pyles. The decision was issued by Special Master Thomas L. Gowen on May 22, 2023.
Source PDFs
USCOURTS-cofc-1_16-vv-00269