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Cerebellar AVMs

Last Updated: September 28, 2018

Petrosal AVM

Cerebellar arteriovenous malformations (AVMs) make up 10% to 14% of all AVMs and are more likely to present with hemorrhage and inflict neurologic deficits than their cerebral counterparts. Because of their aggressive course, a lower threshold for pursuing treatment of unruptured lesions is reasonable. These AVMs are readily exposed via traditional suboccipital, retromastoid, and supracerebellar craniotomies and their combinations.

Operative Anatomy

Each hemisphere of the cerebellum has tentorial, petrosal, and suboccipital surfaces, and each surface has its associated fissure that divides the hemisphere into lobules. The falx cerebelli runs between the two hemispheres and forms the posterior cerebellar incisura adjacent to the vermis. Inferiorly, the cerebellar tonsils exte...