title: Dissecting aneurysms of the basilar artery in 2 patients.
abstract: An uncommon consequence of intracranial vascular disease is the intramural dissection of blood or "dissecting aneurysm". A 69-year-old man with chronic subarachnoid hemorrhage from a posterior fossa mass lesion and a 30-year-old man with migraine and a brain stem stroke illustrate the diverse etiologic, clinical, radiographic, and pathologic characteristics of this unusual lesion.
mesh_terms: D000368:Aged; D000784:Aortic Dissection / Q000000981:diagnostic imaging / Q000473:pathology*; D001488:Basilar Artery / Q000000981:diagnostic imaging / Q000473:pathology; D001921:Brain / Q000473:pathology; D001933:Brain Stem / Q000098:blood supply; D002533:Cerebral Angiography; D002544:Cerebral Infarction / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000473:pathology*; D002542:Intracranial Embolism and Thrombosis / Q000473:pathology; D008297:Male; D013116:Spinal Cord / Q000473:pathology; D013345:Subarachnoid Hemorrhage / Q000473:pathology; D014057:Tomography, X-Ray Computed