November 26, 2015
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Definition of Brain aneurysm

Brain aneurysm: An aneurysm of a blood vessel in the brain, usually due to a defect in the vessel at birth or from high blood pressure. Rupture of the aneurysm causes a sudden severe headache, often with nausea, vomiting, decreased consciousness, and can be life threatening.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 3/30/2012

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