This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Which is the most common site for congenital cholesteatoma 
Select and explain. 
A. Anterior superior quadrant of tympanic membrane, B. Posterior superior quadrant of tympanic membrane, C. Anterior inferior quadrant of tympanic membrane., D. posterior inferior quadrant of tympanic membrane
A: Anterior superior quadrant of tympanic membrane
Answer: A: Anterior superior quadrant of tympanic membrane 
Explanation: Ans: A .Anterior superior quadrant of tympanic membrane followed by posterior superior quadrant.Congenital cholesteatoma was defined as a white, pearly lesion behind an intact tympanic membrane, which after removal was identified on pathological examination as a cholesteatoma.It is the more common causes for onset of childhood conductive hearing loss unrelated to middle ear effusion.