Vaccination is one of the several known triggers of Parsonage-Turner syndrome
(PTS). This report describes 2 individuals with clinical presentations of
PTS whose symptoms began 13 hours and 18 days following receipt of the
Pfizer-BioNTech BNT162b2 and Moderna mRNA-1273 COVID-19 vaccine,
respectively. The diagnosis of PTS was confirmed using both
electrodiagnostic testing and 3 Tesla magnetic resonance (MR) neurography.
While research is needed to understand the association between PTS and
COVID-19 vaccination, MR neurography may be used to confirm suspected cases
of PTS as COVID-19 vaccines continue to be distributed worldwide.