title: Fusiform aneurysm associated with fenestration of the posterior communicating artery.
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 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.
authors.affiliation: Department of Neurosurgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan. shishi14@nagasaki-u.ac.jp
authors.forename: Shiro
authors.initials: S
authors.lastname: Baba
authors.forename: Yuutaka
authors.initials: Y
authors.lastname: Fukuda
authors.forename: Shingo
authors.initials: S
authors.lastname: Mizota
authors.forename: Kentaro
authors.initials: K
authors.lastname: Hayashi
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Suyama
authors.forename: Izumi
authors.initials: I
authors.lastname: Nagata
mesh_terms: D015901:Angiography, Digital Subtraction; D002340:Carotid Artery Diseases / Q000175:diagnosis* / Q000601:surgery; D002343:Carotid Artery, Internal / Q000601:surgery; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000601:surgery; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D013525:Surgical Instruments