Transcanal endoscopic ear surgery using the transcanal-infrapetrosal approach for petrous apex cholesterol granuloma resection

Abstract

We report a case of a petrous apex cholesterol granuloma, which was treated using transcanal endoscopic ear surgery via the transcanal-infrapetrosal approach.

A drainage route was endoscopically created through the middle ear to the cholesterol granuloma in a 13-year-old male adolescent who presented with hearing loss and otorrhea.

We observed favorable aeration of the middle ear and tubal inflation postoperatively. Additionally, computed tomography revealed that the cholesterol granuloma had reduced in size. Endoscopic ear surgery via the transcanal-infrapetrosal approach is useful for treatment of a petrous apex cholesterol granuloma that extends to the outside of the carotid artery.