Dissecting aneurysm of the cerebral arteries. Case report

A spontaneous dissecting aneurysm of the left middle cerebral artery with extension into its major branches is reported in a 23-year-old man. The characteristic pathological and angiographic findings are demonstrated, including the rarely documented progression of this lesion. The etiological factors, the early recognition by the neuroradiologist, and the possibility of immediate treatment are briefly discussed in this report.