Double urethral obstruction in a neonate - a case report.

Posterior urethral valves are the most common cause of lower urinary tract obstruction in a male child, generally occurring as an isolated anomaly. Congenital anterior urethral diverticulum, although less common, can also cause urethral obstruction. We report a rare combination of the two anomalies in which the proximal, more severe anomaly prevented the initial expression of the other.