This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Operative Surgery, Subject name: ENT
Radical mastoidectomy is done for: 
Select and explain. 
A. ASOM, B. Safe CSOM, C. Atticoantral cholesteatoma, D. Acute mastoiditis
C: Atticoantral cholesteatoma
Answer: C: Atticoantral cholesteatoma 
Explanation: (c) Atticoantral cholesteatoma(Ref. Cummings, 6th ed., 2190)These days MRM is preferred over radical mastoidectomy in the management of unsafe CSOM with or without complications except for a few areas