Image Caption: Close Up of a Cerebral Aneurysm : Cerebral aneurysms can occur in anyone at any age, but they are most common in adults age 30-60 and are slightly more common in women than in men. An unruptured cerebral aneurysm can cause problems by putting pressure on a nerve or on surrounding brain tissue, causing pain near the eye, vision changes, numbness, weakness, or paralysis on one side of the face. Many cerebral aneurysms are small and don't cause any problems, but all have the potential to rupture and cause bleeding in the brain.
If a brain aneurysm presses on nerves in your brain, it can cause signs and symptoms. These can include
- A droopy eyelid
- Double vision or other changes in vision
- Pain above or behind the eye
- A dilated pupil
- Numbness or weakness on one side of the face or body
Treatment depends on the size and location of the aneurysm, whether it is infected, and whether it has burst. If a brain aneurysm bursts, symptoms can include a sudden, severe headache, nausea and vomiting, stiff neck, loss of consciousness, and signs of a stroke. Any of these symptoms requires immediate medical attention.
NIH: National Heart, Lung, and Blood Institute
An intracranial aneurysm (also called cerebral or brain aneurysm) is a cerebrovascular disorder in which weakness in the wall of a cerebral artery or vein causes a localized dilation or ballooning of the blood vessel.
Aneurysms in the posterior circulation (basilar artery, vertebral arteries and posterior communicating artery) have a higher risk of rupture. Basilar artery aneurysms represent only 3%-5% of all intracranial aneurysms but are the most common aneurysms in the posterior circulation.
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