Transplantation of the prepuce to facilitate hypospadias repair in monozygotic twins.

We report a case of free transplantation of the prepuce derived from a monozygotic twin to aid in the reconstruction of penoscrotal hypospadias in his brother. Although monozygotic twins discordant for hypospadias are seen rarely the possibility of preserving and transplanting the prepuce of the unaffected sibling should be considered to facilitate reconstruction of the phallus with hypospadias.