title: Hypoplasia of the circle of Willis with basal angiomatosis and collateral circulation presenting as subarachnoid haemorrhage.
mesh_terms: D000328:Adult; D000798:Angiomatosis / Q000150:complications* / Q000000981:diagnostic imaging; D001932:Brain Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D002560:Cerebrovascular Circulation; D002941:Circle of Willis / Q000002:abnormalities*; D003097:Collateral Circulation; D005260:Female; D006801:Humans; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology*