Cloacal Anomalies in Monoamniotic, Monochorionic Twins with Complete Urinary Tract Obstruction.

Cloacal anomalies (persistent cloaca) represent the most severe form of anorectal malformations in girls where the rectum, urethra, and vagina remain fused together inside the pelvis and drain into a single common perineal orifice. Infants with cloacal anomalies often succumb to poor lung development due to oligohydramnios. Cloacal anomaly in discordant monozygotic twins has rarely been reported in the literature. In this review, we present the first case of persistent cloaca and complete urinary tract obstruction in discordant monoamniotic twins.