Tremor Other Hyperkinet Mov (N Y)
June 2022
Background: Hemichorea-hemiballismus is a rare hyperkinetic movement disorder.
Case Report: A 90-year-old male developed left hemichorea-hemiballismus after his second dose of the Pfizer-BioNTech COVID-19 vaccine. A wide range of investigations including magnetic resonance imaging did not reveal an alternative cause.