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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
In a patient with CSOM, labrynthine fistula most commnonly involves ?
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The correct answer is  Ans. is 'b' i.e., Lateral SCC Labrynthine fistula is almost exclusively repoed in association with chronic otitis media and cholesteatoma. The most commonly affected canal is lateral (horizontal) semicircular canal, but involvement of the posterior and superior canals as well as other regions of labyrinth have been repoed. The incidence of labrynthine fistula in chronic otitis media is approximately 10%.