title: Hemichorea due to hemodynamic ischemia associated with extracranial carotid artery stenosis. Report of two cases.
abstract: In this paper the authors describe two patients with recurrent hemiparesis and limb shaking that gradually progressed to hemichorea. Cerebral angiography confirmed severe unilateral internal carotid artery stenosis (95%) contralateral to the hemichorea. The cerebral blood flow, assessed using N-isopropyl-p-(iodine-123) iodoamphetamine single-photon emission computed tomography (SPECT), disclosed markedly decreased vascular reserves in both patients. After carotid endarterectomy was performed, the hemichorea gradually subsided and SPECT confirmed increased cerebral perfusion. The results in these cases indicate that surgical revascularization is effective for hemichorea due to cerebral ischemia with reduced vascular reserve.
authors.affiliation: Department of Neurosurgery, Faculty of Medicine, The University of Tokushima, Japan.
authors.forename: Ryoma
authors.initials: R
authors.lastname: Morigaki
authors.forename: Masaaki
authors.initials: M
authors.lastname: Uno
authors.forename: Atsuhiko
authors.initials: A
authors.lastname: Suzue
authors.forename: Shinji
authors.initials: S
authors.lastname: Nagahiro
mesh_terms: D000368:Aged; D002545:Brain Ischemia / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D002343:Carotid Artery, Internal; D016893:Carotid Stenosis / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D002819:Chorea / Q000209:etiology*; D016894:Endarterectomy, Carotid; D005260:Female; D006801:Humans; D008297:Male