Dyskinesia of vascular origin. Clinical data and response to therapy in 7 cases.

Seven patients with dyskinesia due to cerebrovascular lesions are described. They presented hemichorea, hemiballism and focal dystonia; the site(s) of the lesion responsible, as defined by MRI (magnetic resonance imaging) or CT (computerized tomography) scan were the putamen, the caudatus, the thalamus and the subthalamic body of Luys. Data of similar cases in the literature are reviewed with reference to the location of the responsible lesions, which can aid in predicting the outcome of illness or prescribing treatment.