Neurological Surgery No Shinkei Geka Volume 27, Issue 11 (November 1999)

Size and Location of Ruptured Cerebral Aneurysms Diagnosed by Three Dimensional Computed Tomographic Angiography Tohru OKUYAMA 1 , Koji SAITO 1 , Akira HIRANO 1 , Shinsuke IRIE 1 , Tohru INAGAKI 1 , Shigeru INAMURA 1 1Department of Neurosurgery, Kushiro Neurosurgical Hospital Keyword: 3D CT angiography , ruptured cerebral aneurysm , operation pp.993-997
Published Date 1999/11/10
  • Abstract
  • Look Inside

The purpose of this study is to confirm the correct size and the location of ruptured cerebral aneurysmsdiagnosed and measured using three dimensional computed tomographic angiography. The size and thelocation were investigated in 136 ruptured cerebral aneurysms encountered in our hospital during 3 yearsand 10 months.

As regards the location of 136 ruptured cerebral aneurysms, 40 were anterior communicating arteryaneurysms, 35 were middle cerebral artery aneurysms, 33 were internal carotid artery aneurysms, 12 weredistal anterior cerebral artery aneurysms and 16 were posterior circulatory aneurysms. Twenty-seven aneu-rysms (19.9%) were smaller than 3.0 mm, and 74 aneurysms (54.4%) were less than 5.0mm in maximumdiameter. The maximum diameter of aneurysms located on the anterior communicating artery was 4.8mm.On the middle cerebral artery it was 6.7 mm, and on the internal carotid artery it was 7.4mm. We concluded that the rate of small aneurysmal rupture was comparatively more frequent than is report-ed. The results led to the speculation that the aneurysmal rupture occurred more often in smaller size, andthe rate of occurrence may be also related to the aneurysmal location.

Copyright © 1999, Igaku-Shoin Ltd. All rights reserved.


Neurological Surgery 脳神経外科
27巻11号 (1999年11月)
電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院