title: Bilateral dehiscence of the bony cochlear basal turn.
abstract: OBJECTIVE
  To identify bony labyrinth defects as causing symptoms that might otherwise be difficult to understand.
  
  
  METHODS
  Imaging investigation on cases of lowered vestibular evoked myogenic potentials (VEMP) threshold.
  
  
  METHODS
  Academic tertiary case-referral medical center.
  
  
  METHODS
  One patient with continuous bilateral tinnitus.
  
  
  METHODS
  High-resolution computed tomography of petrous bone was performed after audiometry, impedance, and VEMP recording.
  
  
  RESULTS
  We found a previously unreported dehiscence of the bony plate between the basal turn of the cochlea and the carotid canal.
  
  
  CONCLUSIONS
  A VEMP study could prompt diagnostic imaging tests that might otherwise be neglected. Moreover, it is important to consider the possibility of a bony dehiscence involving not just the semicircular canals.
authors.affiliation: Department of Anesthesiologic and Surgical Sciences, University of Bologna, Bologna, Italy. giovanni.modugno@unibo.it
authors.forename: Giovanni Carlo
authors.initials: GC
authors.lastname: Modugno
authors.forename: Cristina
authors.initials: C
authors.lastname: Brandolini
authors.forename: Ivanpietro
authors.initials: I
authors.lastname: Cappello
authors.forename: Antonio
authors.initials: A
authors.lastname: Pirodda
mesh_terms: D003051:Cochlea / Q000002:abnormalities*; D005072:Evoked Potentials, Auditory; D006801:Humans; D008297:Male; D008875:Middle Aged; D010579:Petrous Bone / Q000000981:diagnostic imaging; D014012:Tinnitus / Q000209:etiology; D014057:Tomography, X-Ray Computed