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In Aneurysm
What is a brain aneurysm?
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A brain aneurysm is an aneurysm that occurs in the brain. An aneurysm is the bulging of an artery that results from weakness in the artery's wall. The major compli…cation of aneurysms is that the wall can become so weak that the aneurysm ruptures, causing hemorrhage that can ultimately lead to death if not treated quickly. There are generally two classes of brain aneurysms: berry (saccular) aneurysms and Charcot-Bouchard aneurysms. Berry aneurysms have a tendency to occur in families (eg, in association with a disease called polycystic kidney disease), although they are less commonly associated with hypertension (high blood pressure). They most commonly occur in the circle of Willis, a major system of arteries that provides blood to the brain. Since the circle of Willis is outside of the brain, ruptured berry aneurysms don't frequently cause intracerebral (within the brain) hemorrhages; they usually cause subarachnoid hemorrhages. Charcot-Bouchard aneurysms, on the other hand, are most commonly associated with hypertension and typically occur in the small arteries that penetrate into the brain. As a result, a ruptured Charcot-Bouchard aneurysm leads to an intracerebral hemorrhage. (MORE)