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A Case Showing the Infraoptic Course of the Anterior Cerebral Artery Associated with Anterior Cerebral Artery Aneurysm Mikihiko TAKESHITA 1 , Osami KUBO 1 , Hideaki ONDA 1 , Takeki NAGAO 1 , Takakazu KAWAMATA 1 , Hideaki UCHINUNO 1 , Masae NITTA 1 , Kazuhito YAMAMURA 1 , Mizuo KAGAWA 1 1Department of Neurosurgery, Neurological Institute Tokyo Women's Medical College Keyword: Vascular anomaly , Anterior cerebral artery , Internal carotid artery , Cerebral aneurysm , Optic nerve pp.871-876
Published Date 1991/9/10
DOI https://doi.org/10.11477/mf.1436900325

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  • Abstract
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Abstract

A ruptured anterior cerebral artery aneurysm with anomalous right infraoptic course of the anterior cere-bral artery (ACA) was reported.

A 40-year old male was admitted because of SAH episode, and computerized tomography (CT) on the day of admission revealed hemorrhage in both Sylvian and interhemispheric fissures. Four-vessel angiography was performed on the same day. A saccular aneurysm was demonstrated in the region of the anterior com-municating artery (ACoA) , and anomalous artery, which originated from the intradural right carotid artery at the level of the right ophthalmic artery was found to be running medially and superiorly. It sup-plied the bilateral callosomarginal arteries and the un-paired pericallosal artery. The fenestration of the ver-tebral artery, duplication of bilateral superior cerebellar arteries, and an occipital artery arising from the right internal carotid artery at the C3 level were found. Surgery was performed on the first day of admission, and the anterior interhemispheric approach was selected. The anomalous branch of the right ICA ran beneath the right optic nerve, ascended between the op-tic nerves, and supplied the ACoA system. The left hypoplastic A1 segment entered the ACoA. However, the right A1 segment could not be found. The aneurys-mal neck, situated between the bilateral callosomarginal arteries and the unpaired pericallosal artery, was clip-ped with Sugitas curved clip. The postoperative course was uneventful and a follow-up angiograph revealed successful obliteration of the aneurysm.


Copyright © 1991, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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