Neurocysticercosis-induced hemiballismus in a child.

Neurocysticercosis lesions can occur in the basal ganglia, but most of these are clinically silent. Neurocysticercosis manifesting as movement disorders is extremely uncommon. The authors report a case of neurocysticercosis in an 11-year-old girl presenting with right hemiballismus (a clinical manifestation not yet reported). Magnetic resonance imaging of the brain confirmed the solitary neurocysticercosis lesion in the left thalamus. The child was symptomatic for 5 years and improved dramatically within 2 days of starting definitive therapy for neurocysticercosis (albendazole and prednisolone).