Hyperkinetic Choreiform Movements Secondary to Basal Ganglia Calcification and Underlying Developmental Venous Anomaly.

Chorea is irregular, involuntary movements that are associated with a variety of conditions and can encompass a wide differential. Unilateral hyperkinetic choreiform movements represent a rare subset characterized by the acute and sudden onset of progressive, uncontrollable body movements. We present a patient presenting with left-sided arm and leg arrhythmic movements caused by right-sided basal ganglia calcifications associated with an underlying developmental venous anomaly (DVA). To the author's knowledge, this is only the second reported case of such a presentation, and it should be on the differential in patients presenting with unilateral movement abnormalities.