Bilateral Oval and Round Window Atresia on CT Temporal Bone: A Rare Anomaly Clinically Mimicking Otosclerosis in an Adult

<div>Pure tone audiometry (PTA) of left ear (a) and right ear (b) showing bilateral severe conductive hearing loss. Note bilateral intact unmasked bone conduction (BC) (marked by arrowheads) and profound flat air conduction (AC) loss (marked by X for left and circle for right ear) across all frequencies resulting in significant air-bone conduction (ABC) gap.</div>

Case Reports in Radiology

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Figure 2: Bilateral Oval and Round Window Atresia on CT Temporal Bone: A Rare Anomaly Clinically Mimicking Otosclerosis in an Adult 