title: A case of osteoma with cholesteatoma in the external auditory canal.
abstract: Osteoma in the external auditory canal (EAC) is an uncommon benign lesion, which presents as a solitary, unilateral, and slow-growing pedunculated mass in the outer half of the bony canal. It is usually asymptomatic; but symptoms can arise if a canal obstruction occurs. External canal cholesteatoma is also a rare lesion of the external auditory canal. Cholesteatoma of the external auditory canal may arise via several mechanisms. However, an occlusion or narrowing of the external auditory canal is the basic pathogenesis. The association of an osteoma with a cholesteatoma is extremely rare, and there have been very few reports published. We encountered a rare case of a 49-year-old man with an osteoid osteoma that was complicated by a cholesteatoma in the external auditory canal. The canal wall down mastoidectomy and tympanoplasty successfully removed the osteoma and the cholesteatoma, and no recurrence or complications had occurred in the first 6 months postoperatively.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, South Korea. leedh0814@catholic.ac.kr
authors.forename: Dong-Hee
authors.initials: DH
authors.lastname: Lee
authors.forename: Beom-Cho
authors.initials: BC
authors.lastname: Jun
authors.forename: Chan-Soon
authors.initials: CS
authors.lastname: Park
authors.forename: Kwang-Jae
authors.initials: KJ
authors.lastname: Cho
mesh_terms: D001859:Bone Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D002781:Cholesteatoma / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D004424:Ear Canal / Q000473:pathology* / Q000601:surgery; D004427:Ear Diseases / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008416:Mastoid / Q000601:surgery; D008875:Middle Aged; D010016:Osteoma / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D010784:Photomicrography; D014057:Tomography, X-Ray Computed; D014433:Tympanoplasty