Idiopathic herniation of the cerebellum into the mastoid process with internal jugular vein thrombosis

Abstract

Spontaneous herniation of cerebellum into mastoid air cells is a rare occurrence and has not been reported in the recent literature. We report a case of 37-year old man presenting with right ear pulsatile tinnitus and intermittent imbalance for the last 12 years. CT temporal bones showed a benign looking destructive lesion of posterior aspect of the right petrous bone.