Video shows a 54-year-old man with left hemiballism large-amplitude movements involving the predominantly proximal arm and leg

Hemiballism secondary to central nervous system toxoplasmosis. Video shows a 54-year-old man with left hemiballism exhibiting large-amplitude movements involving the predominantly proximal arm and leg. On MRI, fluid-attenuated inversion recovery (FLAIR) images show numerous multifocal hyperintense lesions that also involve the basal ganglia.