Two cases of pseudoduplication of the external genitalia.

In two newborn boys an accessory rudimentary phallus and scrotal sacs were present on the surface of a midline perineal swelling. Both boys had an associated high anorectal anomaly (ARA), a small phallus, and a bifid scrotum with absence of the scrotal raphé. One also had penile torsion with hypospadias and an accessory anal dimple. During definitive surgery for the ARA in one patient, excision of the perineal soft-tissue mass and overlying duplicated penoscrotal tissue was performed. The embryogenesis of this condition is discussed.