====== Pericallosal artery aneurysm epidemiology ======

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[[Pericallosal artery aneurysm]] (PAA) are not common clinically and represent 2 to 9% of [[intracranial aneurysm]]s.

These aneurysms tend to be smaller in size, broad-based, associated with additional aneurysms, and at arterial branching sites, which can make both diagnosis and treatment difficult.