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Basilar Aneurysm: Pterional Approach

Last Updated: September 28, 2018

Clip Ligation of a Basilar Artery Bifurcation Aneurysm

Aneurysms of the basilar artery pose some of the greatest technical challenges to both microsurgical and endovascular neurosurgeon. The length of the basilar artery and its bifurcation are lined with indispensable perforating arteries.

Distal basilar artery aneurysms (including the basilar bifurcation and superior cerebellar artery aneurysms) comprise 65% of all posterior circulation aneurysms and 7% of all cerebral aneurysms.

Although surrounded by numerous unforgiving perforators, these aneurysms harbor a more consistent projection than other aneurysms, most often projecting anteriorly and superiorly. Occasionally these aneurysms grow posteriorly into the interpeduncular cistern.

If they reach a giant size, they can impact the...