Subarachnoid Hemorrhage Caused by Ruptured Non-dissecting Fusiform Aneurysm in the Anterior Temporal Artery: A Case Report

The patient was a 69-year-old female. She was admitted to the hospital due to disturbed consciousness. Computed tomography (CT) revealed a Fisher group 3 subarachnoid hemorrhage (SAH). A fusiform aneurysm was found in the anterior temporal artery (ATA) . We performed trapping and resection of the aneurysm on the same day. Fusiform aneurysms occur mainly in the vertebrobasilar artery, and the most common cause is cerebral artery dissection. Fusiform aneurysms in ATA are rare. To date, there have been no reports of ruling out the possibility of cerebral artery dissection and diagnosis of an atherosclerotic fusiform aneurysm by histopathology.