1 MCQs in ENT for NEET PG
A 5-year-old boy presents with bilateral preauricular pits and a history of recurrent drainage from a small opening anterior to the left sternocleidomastoid. Audiometry reveals the pattern marked **A** in the diagram. CT temporal bone shows Mondini dysplasia with enlarged vestibular aqueduct. His father has mild hearing loss and a preauricular pit but no renal disease. Which of the following genetic mutations is most likely responsible for this autosomal dominant syndrome?
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