This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Cholesteatoma is commonly associated with? 
Select and explain. 
A. Attico-antral CSOM, B. Tubotympanic CSOM, C. Tympanosclerosis, D. Foreign body in ear
A: Attico-antral CSOM
Answer: A: Attico-antral CSOM 
Explanation: Cholesteatoma is commonly associated with the attico-antral type of CSOM. Attico-antral type of CSOM involves posterosuperior pa of the cleft and is associated with an attic or marginal perforation. The disease is often associated with the bone-eroding processes such as cholesteatoma, granulations and osteitis. Ref: PL Dhingra 7th edition of Ear, Nose and Throat; Pg no 78