Acute urinary retention is a urological emergency in adults and is often associated with benign prostatic hyperplasia. However, anuria in children is relatively rare and has been described mainly through case reports with a variety of causes.

Posterior urethral valve is a congenital disease that occurs due to a disorder in the formation of the urogenital tract of the child during the fetal period. The frequency of this disease in boys ranges from 1/5000 to 1/25,000.

Urethral tumors or urethral valves are diseases that need to be detected and treated early to avoid dangerous complications of the urinary system. To treat urethral tumors or urethral valves, patients will undergo endoscopic surgery to increase effectiveness, shorten treatment time and reduce pain for patients.