Partial transposition of the penis and scrotum with anterior urethral diverticulum in a child born with the caudal regression syndrome.

Caudal regression is a rare anomaly often associated with urogenital abnormalities. We report a case of the caudal regression syndrome associated with partial transportion of the penis and scrotum, and a giant anterior urethral diverticulum. We also report our surgical technique for 1-stage reconstruction of the external genitalia, as well as a review of the embryological development of this anomaly.