Cloacal exstrophy is a rare anomaly, with a severe disruption of the urogenital tract
resulting in a central mass of exstrophic bowel field flanked by two hemibladders.
The reported case highlights the diagnosis of this discordant anomaly in monochorionic
monoanmniotic twins as early as 12 weeks. It underscores the major ultrasound criteria
like non visualisation of fetal bladder and infra-umbilical protruberant heterogenous
mass which have an important role in early prenatal diagnosis of the anomaly.
Keywords
Prenatal - First trimester - Cloacal exstrophy - Ultrasound