title: Significance of infundibular dilatation in unexplained subarachnoid hemorrhage.
abstract: Angiographically equivocal aneurysmal dilatation at the junction of the internal carotid and the posterior communicating arteries was noted in a patient with documented subarachnoid hemorrhage. This was initially thought to be infundibular dilatation. A craniotomy revealed an actual aneurysm, which was obliterated successfully. Whether infundibular dilatation is a preaneurysmal state or a benign dilatation is controversial. The management of angiographically noted infundibular dilatation in cases of "essential" subarachnoid hemorrhage is discussed.
mesh_terms: D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging* / Q000473:pathology; D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000473:pathology; D004108:Dilatation, Pathologic; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000473:pathology; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging* / Q000473:pathology