Brain aneurysm is not a tumor. Part of the artery wall is defected and thinning. It protrudes out like a tiny baloon. If often occurs in men 40-60 years old and women 50 to 60 years old. Top causes include congenital malformations, followed by infection and atherosclerosis. Brain aneurysm is associated with high risk. Usually you have no symptoms. If it ruptures, it will cause subarachnoid hemorrhage. Symptoms include transient loss of consciousness, severe headache, and neck stiffness. Severe cases may have coma or even die. A small proportion of brain aneurysm can be treated using intravascular surgery. The majority must do open-skull surgery and clip aneurysm under microscope.
How is Brain aneurysm treated in practice?