An<unk>  (or<unk>  is a localized, blood-filled dilation (bulge) of a blood vessel caused by disease or weakening of the vessel wall.<unk> s most commonly occur in arteries at the base of the brain (the circle of Willis) and in the aorta (the main artery coming out of the heart), a so-called aortic<unk> . The bulge in a blood vessel can burst and lead to death at any time. The larger an<unk>  becomes, the more likely it is to burst.<unk> s can usually be treated.
Aneurysm
Coma
Angioma
Hematoma
Vascular tumor
Intracranial aneurysms
Pseudoaneurysm
Meningism