title: Pleomorphic adenoma of the external auditory canal complicated by hearing loss secondary to chronic otitis media.
abstract: Pleomorphic adenoma (PA) rarely occurs in the external auditory canal (EAC). A case of PA complicated with chronic otitis media is reported. The patient was a 36-year-old male who began to experience a hearing loss in the left ear in 1996. He sought medical attention only after ear pain developed in April 2003. At the initial examination, a tumor covered by smooth skin was seen filling the left EAC. Pure-tone audiometry showed residual hearing at low frequencies and scale-out across middle to high frequency range. The CT and MRI findings led to a diagnosis of a tumor of the left EAC complicated with an inflammatory middle-ear lesion. The tumor was excised en bloc with the overlying skin, and tympanoplasty was performed. The pathological diagnosis was PA of the left EAC and inflammatory granuloma of the middle ear.
authors.affiliation: Department of Otolaryngology, Tokyo Medical University, Tokyo, Japan. tsuka1116@nifty.com
authors.forename: Kiyoaki
authors.initials: K
authors.lastname: Tsukahara
authors.forename: Mamoru
authors.initials: M
authors.lastname: Suzuki
authors.forename: Ryoji
authors.initials: R
authors.lastname: Tokashiki
authors.forename: Rei
authors.initials: R
authors.lastname: Motohashi
authors.forename: Keiichi
authors.initials: K
authors.lastname: Iwaya
mesh_terms: D008949:Adenoma, Pleomorphic / Q000150:complications / Q000473:pathology / Q000601:surgery; D000328:Adult; D001301:Audiometry, Pure-Tone / Q000379:methods; D002908:Chronic Disease; D004431:Ear, External / Q000473:pathology* / Q000601:surgery*; D006319:Hearing Loss, Sensorineural / Q000150:complications* / Q000209:etiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010033:Otitis Media / Q000150:complications*; D013506:Otologic Surgical Procedures / Q000379:methods