Drainage Procedures for Petrous Apex Lesions

Endoscopy‐assisted surgery with topical mitomycin for a cholesterol granuloma in the petrous apex

“…Brackmann and Giddings described five approaches to drainage surgery for a CG in the PA: infralabyrinthine, infracochlear, trans-sphenoidal, translabyrinthine, and middle fossa approaches. 1 Our patient had a good bone-conduction hearing level preoperatively. Although infralabyrinthine and infracochlear approaches are familiar ones, they involve a risk of profound hearing loss on the operated side.…”