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Confluent hypodense plaques of demineralization partially surrounding the basal turns of both cochlea, yet sparing the middle and apical turns [Retrofenestral/Cochlear otospongiosis] (grade 2A - Symons and Fanning CT grading system), more on the left side.
Associated smaller hypodense plaques of demineralization are seen at the left fissula ante fenestrum, representing fenestral otospongiosis.