title: Aneurysms of the anterior circle of Willis: imperfections of 'modern treatment'.
mesh_terms: D002533:Cerebral Angiography; D002941:Circle of Willis; D003250:Constriction; D005500:Follow-Up Studies; D006801:Humans; D007023:Hypotension, Controlled; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000401:mortality / Q000601:surgery* / Q000628:therapy; D008026:Ligation; D012008:Recurrence; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology / Q000628:therapy