Diagnosis of the congenital urethral anomalies of male child by voiding cystourethrography.

Congenital urethral anomalies in boys are rare. This report concerns seven children with congenital urethral anomalies other than hypospadias from March 1995 to February 1998. Seven cases of congenital urethral anomalies were diagnosed by voiding cystourethrography (VCUG) from 1246 examinations of boys over a period of three years. There were four posterior urethral values, one anterior urethral valve, one anterior urethral diverticulum, and one megalourethra. Five of them had vesicoureteral reflux (VUR). Two cases of posterior urethral valve had renal failure in spite of surgery. Three cases exhibited renal cystic dysplasia. The clinical presentation and imaging findings are presented. Conventional fluoroscopically monitored VCUG is the principal examination used for bladder and urethra study in children. Therefore, in boys presenting the signs and symptoms related to voiding disturbance, VCUG is used to detect not only VUR but also anomalies in the bladder and urethra. In conclusion, VCUG is safe and essential for diagnosis of congenital urethral anomalies.