Types of and Location of Cerebral Aneurysms


Cerebral aneurysms are classified both by size and shape.

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Most cerebral aneurysms are asymptomatic. They usually occur at the bifurcations and branches of the large arteries located at the Circle of Willis. Approximately 85% of aneurysms occur in the anterior part of the circle of Willis. About 25% of the time aneurysms occur as multiples and 20% are bilateral (Prayson R. 2001)

The most common sites include the:

cerebral sites

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The majority of cerebral aneurysms occur in the anterior portion of the circle of Willis.
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References


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