Abstract
Nineteen of 20 cases with the aneurysm of the distal anterior cerebral artery underwent operations, of whom 4 cases (21%) went to death. As 2 of 4 cases were in serious conditions with the complication of intracerebral hematoma, they were outside the indication of operation. So, it can be said that the mortality is 12%(2 of 17 cases). The cause of death was the postoperative intracerebral hematoma due to the dissection of the bridging vein. We try to cut the tip of superior sagittal sinus and do retraction of both bridging vein and frontal lobe, so as not to cut the frontal lobe.
