A 32-year-old woman presents with progressive bilateral hearing loss over 5 years and paracusis of Willis. Audiometry shows a conductive hearing loss with an air-bone gap. The structure marked **A** in the diagram shows a characteristic 15-20 dB depression of bone conduction thresholds at 2 kHz. Tympanometry is type As with absent acoustic reflexes bilaterally. What is the pathophysiological basis of this finding, and what would be the expected change in bone conduction at 2 kHz following successful stapedotomy?
Ready to test yourself?
Test your ENT knowledge with AI-powered MCQs and detailed explanations — no signup required to try.
Sign up free and practice all 1 Carhart Notch — Otosclerosis Stage III MCQs with AI-powered explanations tailored to your performance.
Create Free Account