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1. First annotated image shows areas of demineralization centered to the cochlear promontory involving oval window and fissulae ante fenestrae (white arrows)
2. Second and third magnified annotated images in the coronal plane of both right and left petrous bones showing the areas of demineralization (white arrows)
3. Forth and fifth annotated images show focal demineralization medial to the basal cochlear turns and cochlear apertures (black arrows)