title: Considerations on the origin of subarachnoid hemorrhages.
abstract: The Authors emphasize the importance of C.T. in the study of subarachnoid hemorrhages. By means of this new radiological investigation they are able to exclude a vascular or tumoral etiology in those patients who had no aneurysms detectable by cerebral angiography, and suggest the problem of the so-called spontaneous subarachnoid hemorrhages. They discuss the degenerative nature of the endocranial aneurysms. Several interesting case-reports stress the importance of the primitive lesions of the arterial wall vessel in the degenerative origin of endocranial aneurysms.
mesh_terms: D001921:Brain / Q000098:blood supply; D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000473:pathology; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000473:pathology; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology*; D014057:Tomography, X-Ray Computed