Letter B

Brain aneurysm

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<B>Brain aneurysm:</B> A brain aneurysm is a small outpouching (an 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 are prone to rupture and bleed.

Also called a berry aneurysm.</P> An aneurysm is, by definition, a localized widening (dilatation) of an artery, vein, or the heart.

At the area of an aneurysm, the wall is weakened, bulges and is at risk to rupture.

</P> The word 'aneurysm' comes from the Greek 'aneurysma' meaning 'a widening.'

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