A Case of Intracranial Aneurysm Masquerading as Space-Occupying Lesion

Cerebral or intracranial aneurysms result from abnormal focal dilation of an artery in the brain due to weakening of the blood vessel wall. They occur at the bifurcations of large to medium sized intracranial arteries. Approximately 80% aneurysms occur in the anterior circulation and about 20% have multiple aneurysm sites. Familial aneurysms rupture at a smaller size and younger age than sporadic cases. We present a case of cerebral artery aneurysm in a 49-year-old female patient. The patient was admitted as a case of the intracranial space-occupying lesion with complaints of headache subsequently found to have an internal carotid artery aneurysm.