Pearls & Oy-sters: Arteriovenous Malformation With Sinus Thrombosis and Thalamic Hemorrhage: Unusual Cause of Parkinsonism and Dementia.

Deep cerebral venous thrombosis is an uncommon condition, which usually produces headache, altered consciousness, and ocular movement abnormality. Parkinsonism occasionally occurs when there is basal ganglia involvement. We report a case of a 78-year-old man who presented with a rapidly progressive parkinsonism with poor response to dopaminergic therapy.