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 A 30-year old male is having Attic cholesteatoma of left ear with lateral sinus thrombophlebitis. Which of the following will be the operation of choice and explain in detail?
Canal wall down procedures: They leave the mastoid cavity open into modified the external auditory canal so that the disease area is fully exteriorised. The commonly performed operations for the atticoantral disease are atticotomy, radical mastoidectomy and rarely, the radical mastoidectomy. ( Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 80)