Hemichorea improved by extracranial-intracranial bypass surgery for middle cerebral artery occlusion.

摘要

Dear Sirs,Hemichorea is often associated with structural ischemic lesions located in the motor frontosubcortical circuit of Alexander [1, 2]. However, the precise pathogenic link between the symptom and lesions remains uncertain [2, 3]. Recent reports have described patients with hemichorea caused by contralateral extra- or intracranial arterial stenosis. Improvement of the hemichorea by surgical re-vascularizations and pre- and postsurgical single-photon emission computed tomography (SPECT) analyses suggested functional hypoperfusion, not a structural infarct per se, as an important etiology of hemichorea [4-8].