Cholesteatoma of External Auditory Can Derivate OS Osteoma: Two Reported Cases
Introduction: External auditory canal osteoma and cholesteatoma are uncommon tumors; both evolutes slowly with fewer symptoms, which is why many times the diagnosis is delayed.
Objectives: We report two cases of osteoma and cholesteatoma of external auditory canal.
Resumed Report: A 31-year-old male patient presented with fetid otorrhea on the right ear. The examination revealed the presence of osteoma. A computed tomographic scan showed mastoid bone tissue density in external auditory canal and soft tissue mass in the right middle ear. Audiometry demonstrated mild to deep conductive hearing loss in the ear committed. A 61-year-old male patient was admitted to our service with right aural fullness. The otoscopy showed osteoma in the external canal. Audiometry showed a mixed hearing loss in the right ear. The computed tomography of the mastoid pointed soft tissue density material in the middle ear and bone formation in the right external auditory canal. We chose a surgical approach with resection of the osteoma and inspection of the middle ear.
Conclusion: Osteoma and cholesteatoma of external auditory canal are rare diseases, if isolated or in association. The diagnosis should be given as fast as possible to avoid dangerous complications, such as deafness and mastoid involvement. Some pathologies must be excluded, such as keratosis obliterans and fibrous dysplasia. Finally, osteomas and cholesteatomas must be diagnosed early to avoid its higher capacity of bone destruction.
Keywords: cholesteatoma, osteoma, external auditory canal.