Bilateral dehiscence of the bony cochlear basal turn.
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.
Modugno
Giovanni Carlo
GC
Department of Anesthesiologic and Surgical Sciences, University of Bologna, Bologna, Italy. giovanni.modugno@unibo.it
Brandolini
Cristina
C
Cappello
Ivanpietro
I
Pirodda
Antonio
A
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