title: Sudden sensorineural hearing loss associated with inner ear anomaly.
abstract: OBJECTIVE
  This study was conducted to evaluate the frequency of inner ear anomaly in patients with sudden sensorineural hearing loss and in control subjects.
  
  
  METHODS
  Retrospective case review.
  
  
  METHODS
  A tertiary referral center.
  
  
  METHODS
  We evaluated 366 patients (165 men and 201 women; age range, 3-91 yr) with sudden sensorineural hearing loss and 228 control subjects without sensorineural hearing loss using magnetic resonance imaging. Three hundred fifty-six patients had unilateral and 10 patients had bilateral sudden sensorineural hearing loss.
  
  
  RESULTS
  Eleven (2.9%) of 376 ears with sudden sensorineural hearing loss had inner ear anomaly. Nine patients (2.5%) had inner ear anomaly associated with sudden sensorineural hearing loss, but none of the 228 control subjects had the anomaly. The current study demonstrated that the frequency of inner ear anomaly in patients with sudden sensorineural hearing loss was significantly higher than in control subjects.
  
  
  CONCLUSIONS
  Our study reveals that inner ear anomaly may be associated with sudden sensorineural hearing loss in 2.5% of patients.
authors.affiliation: Department of Otorhinolaryngology, Nagoya University School of Medicine, Nagoya, Japan. makotos@med.nagoya-u.ac.jp
authors.forename: Makoto
authors.initials: M
authors.lastname: Sugiura
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Nakashima
authors.forename: Shinji
authors.initials: S
authors.lastname: Naganawa
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Otake
authors.forename: Toru
authors.initials: T
authors.lastname: Mukaida
authors.forename: Michihiko
authors.initials: M
authors.lastname: Sone
authors.forename: Eisuke
authors.initials: E
authors.lastname: Sato
mesh_terms: D000158:Acoustic Impedance Tests; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001301:Audiometry, Pure-Tone; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D007758:Ear, Inner / Q000002:abnormalities* / Q000473:pathology; D005260:Female; D006312:Hearing Loss, Bilateral / Q000151:congenital* / Q000175:diagnosis / Q000453:epidemiology; D003639:Hearing Loss, Sudden / Q000151:congenital* / Q000175:diagnosis / Q000453:epidemiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D013063:Speech Discrimination Tests