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Updated: Jul 21, 2025

Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
Published on: September 25, 2009
A Case of Ruptured Cerebral Aneurysm with Asymmetric Fusion of Basilar Apex
Toshinari Meguro1, Miki Taniguchi1, Shuji Hamauchi1
1Department of Neurosurgery 2, Kawasaki Medical School, Okayama, Okayama, Japan.
Objective:
We report a case of a ruptured cerebral aneurysm in which a bifurcation pattern at the tip of the basilar artery was asymmetric fusion type and the superior cerebellar artery (SCA) branched from the posterior cerebral artery (PCA) on the caudal fusion type side.
Case Presentation:
A 45-year-old woman presented with a subarachnoid hemorrhage with a headache. Cerebral angiography revealed that the right SCA diverged from the PCA and a small cerebral aneurysm had developed at this site. This cerebral aneurysm was successfully treated by coil embolization.
Conclusion:
There have been no previous reports on cerebral aneurysms at the site of this normal variation.
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