Osteoma of the Promontory: A Case Report

Abstract

Osteomas of the middle ear are rare lesions. We report the case of a 20-year-old male with osteoma originating from the promontory coincident with tympanic membrane perforation. Histopathological diagnosis was performed by means of a superficial curettage during surgery, to avoid a cochlear fenestration. Postoperative closure of the air-bone gap after myringoplasty confirmed the presumed asymptomatic nature of these lesions.

Osteoma of the Promontory Mimicking a Congenital Cholesteatoma

“…In previously reported cases, osteomas in the middle ear were combined with cholesteatoma or ossicular osteoma. However, osteoma of the promontory of the middle ear is even rarer, with only 5 cases reported to date 2,3,4,5,6). This study reports a case of asymptomatic osteoma of the promontory in the middle ear mimicking a congenital cholesteatoma in a 4-year-old girl.…”

A huge osteoma of the middle ear

“…They most commonly occur in the external ear canal [1], and only 22 cases of middle ear osteoma were reported in the English literature [2][3][4][5][6][7]. Most of them were confined to the mesotympanum and caused conductive type hearing loss.…”

Fibro‐osseous lesions of the external auditory canal

“…Microscopic images show osteomas to be composed of lamellar bone that may present an inner cortex and internal cancellous trabecular areas that are never observed in exostoses 4 . There are reports of osteomas located in the middle ear cavity 5,6 . Osteomas have only occasionally been described outside the external auditory canal and the middle ear, developing in the mastoids, temporal bone, internal auditory canal, glenoid fossa, eustachian tube, petrous apex, and styloid process 7 …”