This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
A child operated for circumcision for meatal stenosis has urine retention recurrently, what is the most likely cause? 
Select and explain. 
A. Recurrence of meatal stenosis, B. Recurrent scab formation, C. Urinary tract infection, D. Failed circumcision
B: Recurrent scab formation
Answer: B: Recurrent scab formation 
Explanation: Ans. b (Recurrent scab formation). (Ref. Bailey & Love, 25th/78.)# Circumcision may benefit boys with recurrent UTI and urinary tract abnormality or boys who need to catheterize regularly (e.g. spina bifida).# But complications like bleeding, infection, and damage to glans and scab formation can be hazardous.