[Pathology of intracerebral hematoma produced by ruptured aneurysms of the anterior cerebral artery (author's transl)].

Forty-eight cases of ruptured aneurysms of the anterior communicating artery and distal branches of the anterior cerebral artery were analyzed at autopsy. The age range of the patients was 20-83 years; 22 were men and 26 were women. The location of the aneurysm in 26 of 48 cases was at the junction of the anterior cerebral and anterior communicating arteries, 18 on the left side, 18 on the right side and the site was not precisely located in 8 cases. There were 4 cases involving the distal branches of the anterior cerebral artery. Analysis of the hemorrhage associated with the ruptured aneurysms revealed 4 distinct patterns: Type I-diffuse subarachnoid hemorrhage alone (17 cases, 35.4%) Type II-subarachnoid hemorrhage and intraventricular hemorrhage a-without intracerebral hematoma (8 cases, 16.7%) b-with intracerebral hematoma (9 cases, 18.7%) Type III-subarachnoid hemorrhage and localized hematoma in supracallosal sulcus with intraventricular rupture through the corpus callosum (6 cases, 12.5%) Type IV-subarachnoid hemorrhage and localized intracerebral hematoma without intraventricular rupture (8 cases, 16.7%).