Glossopharyngeal Cochlear Triangle

The far lateral transcondylar craniotomy is the standard approach for posterior inferior cerebellar artery aneurysm exposure through the microsurgical dissection in the vagoaccessory triangle (VAT). However, the extended retrosigmoid craniotomy and dissection through the glossopharyngeal-cochlear triangle (GCT) may be more appropriate when the patient has an aneurysm arising from a high-riding vertebral artery (VA)-PICA origin.