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Four Cases of Fusiform Posterior Inferior Cerebellar Artery Aneurysms Successfully Treated by Trapping and Occipital Artery-PICA Bypass Daiki OTTOMO 1 , Akitsugu KAWASHIMA 1 , Koji YAMAGUCHI 1 , Yuichi TAKASU 2 , Tomonori KOBAYASHI 1 , Yoshikazu OKADA 1 1Department of Neurosurgery,Tokyo Women's Medical University 2Department of Emergency and Critical Care Medicine,Tokyo Metropolitan Bokutoh Hospital Keyword: fusiform aneurysm , posterior inferior cerebellar artery aneurysm , occipital artery-PICA anastomosis , revascularization pp.331-336
Published Date 2012/4/10
DOI https://doi.org/10.11477/mf.1436101697

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  • Abstract
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 Aneurysms located on the proximal portion of the posterior inferior cerebellar artery (PICA) are rare,and even rarer are fusiform aneurysms in this location. Therefore the principles of surgical management are poorly understood and still subject to debate.

 The management plan for these lesions is based on the proper understanding of the PICA anatomy, and particularly the origin of important perforating arteries. As many anatomic variations of PICA can be observed and the perforator's origin is sometimes in complex anatomical relations with the aneurysm, the management has to be individualized in each case. The objective of management is to exclude of the aneurysm from the circulation while preserving the perforator and distal flow.

 We report four cases of PICA fusiform aneurysms of the anterior or lateral medullary segments which were treated successfully with trapping of the abnormal arterial segment and distal revascularization of PICA. Trapping was adjusted to the specific anatomical circumstances in each case,preserving perforators to the maximum and revascularizing (OA-distal PICA) distal territory.


Copyright © 2012, 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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