title: [Traumatic anterior cerebral artery aneurysms--experiences in 4 cases and review of the literature].
abstract: Five cases of traumatic anterior cerebral artery aneurysms are reported with special emphasis on the initial CT findings of these cases. One case was already reported by Endo (1974). The cases are three in children and two in adults, male four cases and female one case. Four cases had closed head injury, one open. Consciousness level on admission were diversely from clear to semicomatose. Three cases experienced rupture of aneurysms. Time of diagnosis from trauma was from two days to 34 days. Location of aneurysms were near the junction of callosomarginal artery three cases, frontopolar artery one case, and A1-A2 junction one case. Operation was performed in four cases. Results were good in three cases and fair in a case. A case of no operation had fracture of anterior skull base and died from massive nasal and oral bleeding. Autopsy showed an aneurysm of A1-A2 junction, extending to sphenoid sinus. Histological findings of aneurysmal walls were pseudoaneurysm in all cases. There were 48 cases of traumatic anterior cerebral artery aneurysms in the literature. Most of cases are near the junction of callosomarginal artery. As the etiology of the aneurysm it is said that falx cerebri damages the arterial wall. We consider tear of junction of callosomarginal artery is a important factor, since the brain can easily move at the anterior portion of falx. It is very difficult to diagnosis traumatic aneurysms before rupture. But in our three cases of traumatic anterior cerebral artery aneurysms, computed tomographies of very early stage of trauma showed interhemispherical high density area, hematoma and hemorrhage of corpus callosum.(ABSTRACT TRUNCATED AT 250 WORDS)
mesh_terms: D001930:Brain Injuries / Q000150:complications*; D002533:Cerebral Angiography; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D008722:Methods; D008875:Middle Aged; D012887:Skull Fractures / Q000150:complications; D014057:Tomography, X-Ray Computed