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Superior Cerebellar Artery Aneurysm

Last Updated: September 28, 2018

Clip Ligation of a Superior Cerebellar Artery Aneurysm: Technical Principles

Aneurysms of the posterior circulation, including superior cerebellar artery (SCA) aneurysms, present unique technical challenges because they can only be accessed via maneuvering through deep operative corridors with limited working angles bounded by critical neurovascular structures.

The posterior circulation is intimately involved with the brainstem and cranial nerves, and complications related to aneurysm treatment frequently result in clinically significant consequences.

SCA aneurysms are rare lesions with a reported incidence of 1-2% of all aneurysms.  The majority of these aneurysms are located at the proximal aspect of the SCA, typically at the basilar junction. The SCA supplies the main portions of the superior cerebellar hemisphere and the “roof” nuclei.

SCA aneurysms typically present with subarachnoid hemorrhage; their close association to the cranial nerves (CNs) III and IV also results in symptomatic mass effect on these nerves. The common incorporation of the proximal SCA into the neck of these aneurysms makes preservation of this par...