ABSTRACT
We have studied 286 cases of intracranial aneurysm patients, who were admitted, surgically treated and registered at Korea University Medical Center between January, 1980 and February, 1989. This report resents an analysis of 286 cases of surgically treated intracranial aneurysms. The following results were obtained; 1) Intracranial aneurysm was the most common in the 6th decade(100 cases, 35.0%) and the next order was in the 5th decade(82 cases, 28.7%). 2) The male to female ratio was 1 : 1.53, but male predominant below 4th decade. 3) Aneurysmal size was the most common between 3mm and 10mm(264 cases, 85.2%). 4) The most frequent site was anterior communicating artery(102 cases, 32.9%) and the next order was posterior communicating artery(90 cases, 29.0%). 5) The incidence of multiple aneurysm was 6.6%(19 cases). 6) The incidence of single unruptured aneurysm was 7.6%(19 cases), its most common initial symptom was 3rd cranial nerve palsy. 7) The initial clinical status of patients seems to parallel the postoperative prognosis. 8) The degree of cerebral vasospasm on angiography seems to parallel the postoperative prognosis. 9) Postoperative mortality was 10.8%, but it was 3.8% in operation cases after January, 1986. 10) The most common cause of postoperative mortality was cerebral vasospasm(38.7%), and the next order was rebleeding(19.4%).