Osteoma of the Internal Auditory Canal

Abstract

The lack of a consistent presentation despite a similar radiographic appearance suggests that the osteoma is often an incidental finding.

Osteoma of the Internal Auditory Canal as a Rare Finding in Imaging: A Case Report

“…A review of the literature by Suzuki et al (2014) of 17 cases of CAI osteoma identified several clinical features, namely: a mean patient age of 44.1 years (male:44; female:44.2), a female-to-male sex ratio of 1.4:1, bilateral localization for 2 cases. Six cases were identified incidentally (12%), including our case who was asymptomatic on the affected side at detection, 7 cases had subjective or objective hearing loss (41%), 10 cases had tinnitus and/or auditory fullness on the affected side (59%), 11 cases had vertigo and/or dizziness (including medical history) (65%), and 2 cases had facial palsy [6][7][8][9][10][11][12].…”

Bilateral cerebellopontine angle osteomas: Case report and review of the literature

“…Osteoma and exostoses located in IAC and CPA have been reported very rarely, and differential diagnosis should be done from each other. [123456789101112131415161718192021] Osteomas mostly arise from IAC and develop in CPA. They tend to be found in the mastoid cortex and EAC at temporal bone.…”

“…They tend to be found in the mastoid cortex and EAC at temporal bone. [25] In addition, they were found in mastoid air cells and middle ear. [2]…”

Bilateral osteomas and exostoses of the internal auditory canal

“…Three out of 17 cases of osteoma and 3 out of 4 cases of exostoses were bilateral in nature (Table 2) [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Symptomatic patients presented at average age of 50 with an average symptom duration of 6.4 years.…”

“…The most commonly reported symptoms associated with osteomas and exostoses of the IAC have been vertigo (13/21), sensorineural hearing loss (9/21), and tinnitus (9/21) with less common reports of facial paralysis or spasms (2/23). Symptoms are thought to be due to either direct mass compression or by serving as a fulcrum for repetitive trauma with movement [3]. The preponderance of symptoms involving the vestibulocochlear nerve suggests that the facial nerve may be more resistant to compressive effects within the IAC [17].…”