This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
Urinary retention in child is most commonly caused by 
Select and explain. 
A. Metal scab with ulceration, B. Posturethral valve, C. Urethral stricture, D. Epispadius
A: Metal scab with ulceration
Answer: A: Metal scab with ulceration 
Explanation: (A) Metal scab with ulceration # Acute urinary retention in a male child may be due to local inflammatory causes like meatal ulcer with scabbing.> Etiology of Urinary Retention in Children: Neurological processes Severe voiding dysfunction UTI Constipation Adverse drug effect Local inflammatory causes Locally invading neoplasms Benign obstructing lesions Idiopathic Combined UTI and Constipation Incarcerated Inguinal Hernia.