What is an aneurysm?
Question:
Answers:
An aneurysm is a dilation of a blood vessel. The danger would be rupture. Aneurysms are in two basic forms, fusiform, which is a wide dilation of the whole vessel, or saccular, or berry form, which bulges out the side of a vessel, forming a "berry". Fusiform aneurysms are more likely to form in the abdominal aorta, and the saccular more likely in the intracranial vessels.
I think the first two responders are confused in their understanding or terminology, please disregard their comments.
a bloodclot that has broken away and lodged in the brain
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