You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Investigation of choice for cholesteatoma: and explain in detail?
Ans. d (HRCT temporal bone). (Ref. Diseases of ENT, PL Dhingra, 3rd ed., 94)HRCT delineates extent of bone destruction, degree of mastoid pneumatization, status of dural and sinus plates, plates with low lying dura or an anteposed sigmoid sinus (useful when operative treatment is being contemplated) and complications if any in a highly better fashion than a Schuller's view of mastoid. Cholesteatoma causes destruction in key areas of attic and antrum, which is better seen in lateral view, however HRCT temporal bone gives more precise and greater detailed information.