Fusiform Aneurysm Associated With Fenestration of the Posterior Communicating Artery

Shiro BABA, Yuutaka FUKUDA, Shingo MIZOTA, Kentaro HAYASHI, Kazuhiko SUYAMA, Izumi NAGATA
2010 Neurologia medico-chirurgica  
Fig. 1 (A) Left internal carotid angiogram, lateral view, showing a saccular aneurysm at the C 2 segment of the left internal carotid artery (ICA). (B) Three-dimensional digital subtraction angiogram showing the larger branch originating from the dome, and the smaller branch (arrow) originating from the ICA just distal to the aneurysm neck, which joined the larger branch to form the main trunk of the posterior communicating artery. Abstract A 62-year-old male presented with a rare case of
more » ... ration 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 C 2 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.
doi:10.2176/nmc.50.568 pmid:20671382 fatcat:4sse3x5a5jd7dlm4nym5tai3xa