Labyrinthine calcification in ears with otitis media and antineutrophil cytoplasmic antibody-associated vasculitis (OMAAV): A report of two cases

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Figure legends

FIG. 1. Pure-tone audiometry of Case 1 at the first visit to our department.

FIG. 2. Axial temporal bone computed tomography (CT) centered on the mid-to-apical

turn of the cochlea of Case 1. A and B are axial CT images immediately after the onset

of the disease. There are shadows in the middle ear cavity and mastoid bone (arrow) but

no calcification in the cochlea. C shows calcification of the mid-to-apical turn of the

right ear (arrow); D shows no calcification of the cochlea. Reproduced in part from

reference [7].

FIG. 3. Axial temporal bone CT centered on the basal turn of the cochlea of Case 1. A

and B are axial CT images immediately after the onset of the disease. There are

shadows in the middle ear cavity and mastoid bone but no calcification in the cochlea. C

and D also show no calcification of the cochlea. Reproduced in part from reference [7].

FIG. 4. Three-dimensional fluid-attenuated inversion recovery magnetic resonance

imaging (MRI) showed high signals in the cochlea and vestibule (arrow). Reproduced in

part from reference [7].

FIG. 5. Pure-tone audiometry of Case 2 at the first visit to our department.

FIG. 6. Axial temporal bone CT scan and magnified images of Case 2. Panels A and B

show axial CT images obtained immediately after the onset of the disease. There are

shadows in the middle ear cavity and mastoid bone (arrow) but no calcification in the

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cochlea. Panel C shows calcification of the scala tympani in the basal turn of the right

cochlea (arrow) and thickening of the ossicular laminae. Panel D shows calcification of

the scala tympani near the round window of the left cochlea (arrow).

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