title: Magnetic Resonance Imaging Evaluation of Endolymphatic Hydrops in Cases With Otosclerosis.
abstract: OBJECTIVE
  Endolymphatic hydrops (EH) has been reported in cases with otosclerosis, and preoperative EH could be a risk factor for inner ear disturbances after stapes surgery. Visualization of EH has recently become possible using magnetic resonance imaging (MRI) with contrast agents. This study investigated the presence of EH on MRI in ears with clinical otosclerosis.
  
  
  METHODS
  Retrospective case series.
  
  
  METHODS
  University hospital.
  
  
  METHODS
  27 ears of 15 cases diagnosed with otosclerosis.
  
  
  METHODS
  Ears were evaluated by 3-T MRI performed 4 hours after intravenous injection of gadolinium. The degree of EH in the vestibule and cochlea was classified into three grades (none, mild, and significant). Imaging data were compared with clinical findings for all ears.
  
  
  METHODS
  Imaging and clinical findings.
  
  
  RESULTS
  Varying degrees of cochlear EH and vestibular EH were observed in 20 and 15 ears, respectively. Episodes of acute sensorineural hearing loss with rotatory vertigo occurred in four ears that showed severe EH in the cochleae and vestibules. Severe EH, however, was also observed in ears without such symptoms.
  
  
  CONCLUSIONS
  The presence of EH in ears with otosclerosis was clearly visualized in the present patient series. Such MRI evaluation could provide useful information for managing symptoms related to EH.
authors.affiliation: *Department of Otorhinolaryngology, Toyota Memorial Hospital, Toyota, Japan; †Department of Otorhinolaryngology, Nagoya University Graduate School of Medicine, Nagoya, Japan; ‡Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan; and §Department of Otorhinolaryngology, National Center for Geriatrics and Gerontology, Obu, Japan.
authors.forename: Tohru
authors.initials: T
authors.lastname: Mukaida
authors.forename: Michihiko
authors.initials: M
authors.lastname: Sone
authors.forename: Tadao
authors.initials: T
authors.lastname: Yoshida
authors.forename: Ken
authors.initials: K
authors.lastname: Kato
authors.forename: Masaaki
authors.initials: M
authors.lastname: Teranishi
authors.forename: Shinji
authors.initials: S
authors.lastname: Naganawa
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Nakashima
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D018159:Endolymphatic Hydrops / Q000150:complications* / Q000473:pathology; D005260:Female; D005682:Gadolinium; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D010040:Otosclerosis / Q000150:complications* / Q000473:pathology; D012189:Retrospective Studies
chemical_list: D003287:Contrast Media; D005682:Gadolinium