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Causes. Brain aneurysms are caused by thinning artery walls. Aneurysms often form at forks or branches in arteries because those areas of the vessels are weaker. Although aneurysms can appear anywhere in the brain, they're most common in arteries at the base of the brain. Risk factors. Several factors can contribute to weakness in an artery wall.
Blood vessels that send blood to the brain (brain aneurysm). Blood vessels in other parts of the body, such as the legs, groin or neck (peripheral aneurysm). Some small aneurysms have a low risk of rupture.
A disorder that increases your risk of developing a brain aneurysm. These disorders include polycystic kidney disease, coarctation of the aorta or Ehlers-Danlos syndrome, among others. Most aneurysms don't rupture. And for many people, an unruptured aneurysm never causes symptoms.
Vascular dementia is a general term describing problems with reasoning, planning, judgment, memory and other thought processes caused by brain damage from impaired blood flow to your brain. You can develop vascular dementia after a stroke blocks an artery in your brain, but strokes don't always cause vascular dementia.
A brain aneurysm is a weak spot in a blood vessel that bulges out. If it bursts, it can cause dangerous bleeding within the brain. Illustration shows a woman with an unruptured aneurysm.
An aortic aneurysm is a bulge that occurs in the wall of the body's main artery, called the aorta. The aorta carries blood from the heart to the body. Aortic aneurysms can occur anywhere in the aorta. They may be tube shaped or round. Aortic aneurysms include: Abdominal aortic aneurysm.
Most unruptured brain aneurysms don't cause symptoms. Rarely, an aneurysm will push on brain tissue or a nerve, causing pain, double vision, loss of vision, facial weakness or numbness, or unsteadiness.
Mayo Clinic specialists have wide and varied expertise treating brain aneurysms using the most current approaches: Endovascular techniques such as coiling or coiling in combination with stenting. Flow diverters for larger or more complex aneurysms.
Mayo Clinic experts trained in brain conditions (neurologists), brain surgery (neurosurgeons), nonsurgical treatments (neurosurgeons and neuroradiologists), brain imaging (neuroradiologists) and other professionals research brain aneurysm development, diagnosis, monitoring, management and treatment.
A subarachnoid hemorrhage may be caused by: A brain aneurysm that bursts. A brain aneurysm is a bulge in a blood vessel in the brain. The aneurysm can burst and cause bleeding in the space between the brain and the tissues covering the brain, known as the subarachnoid space.