Cerebral Aneurysm - Causes
Most cases of cerebral aneurysm are caused by congenital factors. Congenital means that the person was born with the defect. The person has artery walls that are thinner than normal in some places. It is in these regions that aneurysms develop. Aneurysms may be caused by other factors, as well. These factors include injury to the brain, infection, hardening of the arteries (see atherosclerosis entry), or abnormally rapid growth of brain cells.
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