Cerebral aneurysm

Definition and explanation of Cerebral aneurysm:

A cerebral aneurysm (also called an intracranial aneurysm or brain aneurysm) is a bulging, weakened area in the wall of an artery in the brain, resulting in an abnormal ballooning of the artery that is at risk for rupturing. A cerebral aneurysm more often happens in an artery located in the front part of the brain that supplies oxygen-rich blood to the brain tissue. Arteries anywhere in the brain can develop aneurysms. A normal artery wall is made up of 3 layers. The wall where the aneurysm forms is thin and weak because of an abnormal loss or absence of the muscular layer of the artery wall, leaving only 2 layers.
There are several types of aneurysms:

Berry aneurysm:

The most common type of cerebral aneurysm is called a saccular, or berry, aneurysm, happening in 90% of cerebral aneurysms. This type of aneurysm looks like a “berry” with a narrow stem. More than one aneurysm may be present.

Fusiform aneurysm:

A fusiform aneurysm bulges out on all sides. This forms a dilated artery. Fusiform aneurysms are often associated with atherosclerosis.
https://www.hanxinclinic.com/index.php/2019/10/01/cerebral-aneurysm/

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