Duplicate bladder exstrophy: a unique variant.

Duplicate bladder exstrophy is an extremely rare congenital malformation. Two forms have been described, the anteroposterior form and the collateral form, which is the less common. We report a case of bladder exstrophy in association with a duplicated lower urinary tract, omphalocele, colic duplication and diphallia. Fewer than 30 cases of duplicate bladder exstrophy have been described previously, emphasizing the embryologic significance of this case. To our knowledge it is the first reported case of such an association of anomalies with the exstrophy-epispadias complex.