Cerebral aneurysm is a common cerebrovascular disorder caused by a weakness in the wall of a cerebral artery or vein. The disorder may result from congenital defects or from preexisting conditions such as hypertensive vascular disease and atherosclerosis (build-up of fatty deposits in the arteries), or from head trauma. Cerebral aneurysms occur more commonly in adults than in children and are slightly more common in women than in men, however they may occur at any age.
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