Article Figures & Data
Figures
- fig 1.
58 year-old woman with postoperative hemorrhagic labyrinthitis 2 months after left-sided stapedectomy.
A, Coronal CT scan of left temporal bone shows a hypodensity along a well-located prosthesis (arrow). The lateral semicircular canal is normal.
B, Axial T1-weighted MR image shows abnormal signal intensity of the left lateral semicircular canal, as compared with right ear.
C, Axial T2-weighted MR image (2500/90) shows normal hyperintensity of the lateral semicircular canal (arrow).
D, Contrast-enhanced axial T1-weighted MR image (500/15) shows no change in the signal intensity of the labyrinth.
E, Contrast-enhanced coronal T1-weighted MR image shows an enhancing mass engulfing the prosthesis (arrow). Note the normal enhancement of the tympanic portion of the facial nerve (arrowhead) under the abnormal lateral semicircular canal.
F, Follow-up axial T1-weighted MR image at 1 year shows disappearance of the high signal intensity of the lateral semicircular canal.
- fig 2.
58 year-old man referred for SNHL and vertigo 2 days after stapedectomy with a reparative intravestibular granuloma, confirmed by surgery.
A, Coronal CT scan of the left temporal bone shows a soft tissue mass filling the oval window niche (arrow) and surrounding the tympanic portion of the facial nerve and the prosthesis.
B, Noncontrast T1-weighted MR image (500/15) reveals slight high signal intensity of the vestibule (arrow).
C, Axial contrast-enhanced T1-weighted MR image shows an enhancing mass of the oval window niche (arrowhead) spreading within the vestibule (single arrow) and the posterior (double arrows) and lateral (triple arrows) semicircular canals.
- fig 3.
39 year-old woman referred for SNHL and vertigo 2 months after stapedectomy complicated by suppurative labyrinthitis.
A, Coronal CT scan shows complete filling of the middle ear and oval window niche, enlargement of the oval window (double arrows), osseous erosion of the promontory and the lateral semicircular canal (single arrow), and enlargement of the vestibule and superior semicircular canal (arrowhead).
B, Contrast-enhanced coronal T1-weighted MR image shows enhancement of an inflammatory mass of the epitympanum in communication with the lateral semicircular canal (arrow). Note associated abnormal enhancement of the vestibule, superior semicircular canal (arrowhead), and internal auditory canal.
- fig 4.
44-year-old woman referred for SNHL and vertigo 6 weeks after stapedectomy with a granuloma located around the prosthesis and in the oval window niche.
A, Axial CT scan of the left temporal bone shows well-located prosthesis (arrow) and partial filling of the posterior part of the oval window niche (arrowhead).
B, Noncontrast axial T1-weighted MR image (500/15) shows normal signal intensity of the labyrinthine fluid, except for slightly high intensity around the oval window (arrow).
C, Contrast-enhanced axial T1-weighted MR image (500/15) shows mild enhancement of the oval window (arrow). Tympanic portion of the facial nerve is seen laterally (arrowhead).
D, Axial T2-weighted MR image shows normal high signal intensity of the labyrinthine fluid. A discrete intravestibular bulging of the prosthesis is clearly depicted (arrow).
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