title: Development of conductive hearing loss due to posterior semicircular canal dehiscence.
abstract: We herein report a case of posterior semicircular canal dehiscence (SCD) syndrome who had been audiologically followed up for eight years. The patient originally had sensorineural hearing loss. The audiogram had gradually transformed to pure conductive hearing loss. The posterior SCD was identified in CT scan. The reported case showed the possibility to distinguish the mechanism at play underlying the typical conductive hearing loss in SCD patients by tracing the transition of the hearing loss pattern. This information is of much help to predict the hearing outcomes if surgical intervention were chosen for the treatment.
authors.affiliation: Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. Electronic address: kubomari@virology.med.kyushu-u.ac.jp.
authors.forename: Marie
authors.initials: M
authors.lastname: Kubota
authors.affiliation: Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Kubo
authors.affiliation: Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Yasui
authors.affiliation: Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Nozomu
authors.initials: N
authors.lastname: Matsumoto
authors.affiliation: Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Shizuo
authors.initials: S
authors.lastname: Komune
mesh_terms: D000293:Adolescent; D001301:Audiometry, Pure-Tone; D018450:Disease Progression; D005260:Female; D006314:Hearing Loss, Conductive / Q000209:etiology / Q000503:physiopathology*; D006319:Hearing Loss, Sensorineural / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D007759:Labyrinth Diseases / Q000150:complications / Q000503:physiopathology*; D012665:Semicircular Canals / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed; D058585:Vestibular Evoked Myogenic Potentials
keywords: Hearing loss; Hearing loss pattern transition; Posterior semicircular canal dehiscence; Surgical indication