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5. Cerebral Aneurysms

A cerebral aneurysm is a weakened blood vessel in the brain that enlarges or "balloons" due to persistent pressure from blood flow or a weakness in the blood vessel wall. If the aneurysm ruptures, a hemorrhage results. Other types of blood vessel disorders, such as fibromuscular dysplasia or arterial dissection, may promote the formation of an aneurysm. Cerebral aneurysms are more common in certain families, although not all have a genetic component. High blood pressure and smoking increase the risk of developing an aneurysm.

What Is a Hemorrhagic Stroke? Shidlovski / Getty Images

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This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.