brain, spinal cord, and nerve disorders
Brain Aneurysms
Introduction
An aneurysm is a bulge (dilation) in the wall of an artery. Aneurysms that occur in the arteries of the brain (cerebral arteries) are called cerebral aneurysms. Aneurysms may occur in any artery. (See also Aortic Branch Aneurysms and In the United States, brain aneurysms occur in 3 to 5% of people. Brain aneurysms can occur at any age but are most common among people aged 30 to 60 years. They are more common among women than men. People may have only one cerebral aneurysm or several. 