Letter A

Aneurysm, berry

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A berry aneurysm is a small outpouching (aneurysm) that looks like a berry and classically occurs at the point at which a cerebral artery departs from the circular artery (the circle of Willis) at the base of the brain.

Berry aneurysms often rupture and bleed.

Also called a brain aneurysm.

An aneurysm is a localized dilatation (widening) of a blood vessel (an artery or a vein) or the heart.

At the area of the aneurysm, the wall is weakened, bulging, and at risk of rupture (breaking).

The word 'aneurysm' comes from the Greek 'aneurysma' meaning 'a widening.'

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