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Pericallosal Artery Aneurysm

Last Updated: September 28, 2018

Pericallosal cerebral aneurysms arise from the anterior cerebral arteries (ACA) and its branches distal to the anterior communicating artery (ACoA) complex. Most arise from the branching point between the callosomarginal artery and the main ACA trunk.

In 1948, Sugar and Tinsley described this aneurysm subtype as a relatively rare entity comprising about 5% of all intracranial aneurysms with a slight preponderance in females. Most reports suggest an incidence ranging from 2-9%. Pericallosal artery aneurysms are frequently associated with aneurysms in other locations.

Ruptured pericallosal artery aneurysms frequently present with intraparenchymal hematomas because of their position in the interhemispheric fissure and frequent adherence of their dome to the surrounding pial surfaces.

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