title: Anomalous arrangement of the origins of the anterior choroidal and posterior communicating arteries. Case report.
abstract: A case of anomalous origin of the anterior choroidal and posterior communicating arteries in a 36-year-old woman with aneurysmal subarachnoid hemorrhage is presented. Preoperative four-vessel angiography revealed a reverse relationship of these vessels, wherein the anterior choroidal artery origin was proximal to the origin of the posterior communicating artery. This arrangement is extremely rare; the only other reported case was in a patient undergoing angiography prior to acoustic neurinoma resection. It is believed that this is the first case reported in a patient with subarachnoid hemorrhage from rupture of an aneurysm arising from a vessel of such anomalous origin.
authors.affiliation: Division of Neurosurgery, University of Pennsylvania, Philadelphia.
authors.forename: D J
authors.initials: DJ
authors.lastname: Moyer
authors.forename: E S
authors.initials: ES
authors.lastname: Flamm
mesh_terms: D000328:Adult; D002536:Cerebral Arteries / Q000002:abnormalities*; D002831:Choroid Plexus / Q000098:blood supply*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000209:etiology / Q000601:surgery; D011859:Radiography; D013345:Subarachnoid Hemorrhage / Q000150:complications*