title: Arteriovenous malformation and multiple anomalies of the circle of Willis.
abstract: A case is presented of subarachnoid hemorrhage from an arteriovenous malformation (AVM) involving the left middle cerebral artery in the circle of Willis, seen in association with multiple anomalies of the circle. This is an extremely unusual location for such a malformation. The possible etiology of the AVM and its relationship to the associated anomalies is discussed.
authors.affiliation: Department of Pathology, University of California, Los Angeles 90024.
authors.forename: J E
authors.initials: JE
authors.lastname: McArdle
authors.forename: P
authors.initials: P
authors.lastname: Dwan
authors.forename: P A
authors.initials: PA
authors.lastname: Cancilla
authors.forename: H V
authors.initials: HV
authors.lastname: Vinters
mesh_terms: D002941:Circle of Willis / Q000002:abnormalities*; D005260:Female; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications / Q000473:pathology*; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000209:etiology