Fusiform Aneurysm Associated With Fenestration of the Posterior Communicating Artery —Case Report—

Shiro BABA; Yuutaka FUKUDA; Shingo MIZOTA; Kentaro HAYASHI; Kazuhiko SUYAMA; Izumi NAGATA

doi:10.2176/nmc.50.568

Case Reports

Fusiform Aneurysm Associated With Fenestration of the Posterior Communicating Artery

—Case Report—

Shiro BABA, Yuutaka FUKUDA, Shingo MIZOTA, Kentaro HAYASHI, Kazuhiko SUYAMA, Izumi NAGATA

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Keywords: fenestration, posterior communicating artery, internal carotid artery, intracranial aneurysm, three-dimensional digital subtraction angiography

JOURNAL OPEN ACCESS

2010 Volume 50 Issue 7 Pages 568-570

DOI https://doi.org/10.2176/nmc.50.568

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Abstract

A 62-year-old male presented with a rare case of fenestration of the supraclinoid segment of the internal carotid artery (ICA) at the origin of the posterior communicating artery (PCoA). The patient had a fusiform aneurysm at the proximal branch of the PCoA, which was successfully clipped, sparing the anterograde blood flow. The double origin and fenestration of the PCoA branching off at the C₂ segment of the left ICA suggested that this anomalous fenestration might have developed as the origin of the PCoA rather than the supraclinoid ICA during the early embryonal stage.

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