title: Ruptured aneurysms of anterior cerebral or anterior communicating arteries: CT patterns.
abstract: We reviewed the CT findings in 40 patients with ruptured aneurysms of the anterior cerebral or anterior communicating arteries. Within 3 days of the ictus, the common patterns included blood in the pericallosal cistern and interhemispheric fissure, blood in the caval-septal region, unilateral or bilateral frontal hematoma, and diffuse symmetric intraventricular and basal cisternal blood. In 6 of 23 patients with postcontrast studies, an abnormal enhancing region delineated the aneurysmal sac.
mesh_terms: D002536:Cerebral Arteries; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging*; D012422:Rupture, Spontaneous; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed