Cerebral aneurysm
Also called a brain or intracranial aneurysm, this is the type most people are familiar with. Cerebral aneurysms occur when the wall of a blood vessel in the brain weakens and bulges outward. According to the American Heart Association, this condition affects around three to five percent [9] of Americans.
There are three types of cerebral aneurysms: berry or saccular, mycotic, and fusiform. Berry aneurysm is the most common type and is mostly seen in adults. It is called a berry aneurysm because the bulge has the appearance of a berry. The bulge can vary in size, sometimes swelling over two centimeters [10].
Ruptured cerebral aneurysms are fatal within a short time. According to The Brain Aneurysm Foundation [11], up to forty percent of brain aneurysms result in death. Because the brain is such a delicate organ, many of those who survive a cerebral aneurysm are left with permanent disabilities. Cerebral aneurysms account for most cases of subarachnoid hemorrhagic stroke.