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Brain Aneurysm

Also called: Berry aneurysm, Cerebral aneurysm, Intracranial aneurysm

Summary

A brain aneurysm is an abnormal bulge or "ballooning" in the wall of an artery in the brain. They are sometimes called berry aneurysms because they are often the size of a small berry. Most brain aneurysms produce no symptoms until they become large, begin to leak blood, or burst.

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

Start Here

  • (Mayo Foundation for Medical Education and Research) Also in
  • From the National Institutes of Health (National Institute of Neurological Disorders and Stroke) - Short Summary
  • From the National Institutes of Health (National Institute of Neurological Disorders and Stroke) Also in
  • (American Stroke Association)

Symptoms

  • (Brain Aneurysm Foundation)

Diagnosis and Tests

  • (Brain Aneurysm Foundation)
  • Video (American College of Radiology, Radiological Society of North America) Also in
  • Cerebrospinal Fluid (CSF) Analysis From the National Institutes of Health (National Library of Medicine) Also in Spanish
  • (American College of Radiology, Radiological Society of North America) Also in
  • (American College of Radiology, Radiological Society of North America) Also in

Treatments and Therapies

  • (Brain Aneurysm Foundation)
  • (American College of Radiology, Radiological Society of North America) Also in
  • (American College of Radiology, Radiological Society of North America) Also in

Living With

  • (Brain Aneurysm Foundation)
  • (Brain Aneurysm Foundation)

Related Issues

  • (Brain Aneurysm Foundation)
  • (Mayo Foundation for Medical Education and Research) Also in
  • (Mayo Foundation for Medical Education and Research) Also in

Specifics

  • (Brain Aneurysm Foundation)
  • (Brain Aneurysm Foundation)

Genetics

  • (Brain Aneurysm Foundation)

Images

Videos and Tutorials

Statistics and Research

  • (Brain Aneurysm Foundation)
  • (American Academy of Neurology) - PDF

Striking laughter

  • From the National Institutes of Health (National Institutes of Health)

Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

Find an Expert

  • From the National Institutes of Health Also in

Patient Handouts