title: Membranous band between the tympanic membrane and the external auditory canal.
abstract: Two cases of a membranous band between the tympanic membrane and the external auditory canal are presented. These characteristic structures are rare, but observed in several first branchial cleft anomalies. Neither patient presented with an infection. In Case 1, an eleven-year-old girl has this structure in her right ear. In Case 2, a thirteen-year-old boy has this structure in his left ear. Both patients demonstrated slight air-bone gaps in the affected ear with a pure-tone audiometric test, due to limited vibrations of the tympanic membrane.
authors: Department of Otolaryngology, Kyushu Central Hospital, 2-23-1 Shiobaru, Minami-ku, Fukuoka 815-8588, Japan. Electronic address: kimitsuki@kyushu-ctr-hsp.com.
authors: Takashi
authors: T
authors: Kimitsuki
mesh_terms: D000015:Abnormalities, Multiple / Q000175:diagnosis*; D000293:Adolescent; D001301:Audiometry, Pure-Tone / Q000379:methods; D001934:Branchial Region / Q000002:abnormalities*; D002648:Child; D019465:Craniofacial Abnormalities / Q000150:complications / Q000175:diagnosis*; D004424:Ear Canal / Q000002:abnormalities*; D005260:Female; D005500:Follow-Up Studies; D006311:Hearing Disorders / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D038781:Otoscopy / Q000379:methods; D010608:Pharyngeal Diseases / Q000150:complications / Q000175:diagnosis*; D012494:Sampling Studies; D014432:Tympanic Membrane / Q000002:abnormalities*
keywords: Child; External auditory canal; First branchial cleft; Tympanic membrane