Distal anterior cerebral artery aneurysms, traumatic and non-traumatic

ABSTRACT

Distal anterior cerebral artery [ACA] aneurysms are rare and compose less than 5% of all intracranial aneurysms. Most of the aneurysms in this location are congenital, saccular ones, but it is also a well-known location for traumatic aneurysm. The mechanism of aneurysm development, clinical scenario and/or surgical difficulty are different between these two groups. Between March 2005 to February 2006, 6 cases of distal ACA aneurysms were treated at the Department of Neurosurgery, Fujita Health University, Aichi Prefecture, Japan. The clinical presentations, neurological findings, and treatment were analyzed. Of 6 patients, 2 were male and 4 were female, aged from 66-79 years. Of 6 cases, one was traumatic aneurysm, which occurred 2 months after a fall injury. Of the 5 congenital aneurysms, one was unruptured, the other 4 were all ruptured. One patient had multiple aneurysms. We believe that there are differences between the congenital and traumatic aneurysms in respect to the mechanism of development, aneurysm location, and treatment difficulties