Méga-vessie de découverte anté-natale précoce révélant une malformation cloacale complexe

Cloacal malformations are rare. We describe the prenatal diagnosis of a dilated bladder with vesico-umbilical fistula. US follow-up showed discrepancy between persisting bilateral hydronephrosis and flattening of the mega-bladder at 20 weeks GA. Spontaneous intra-amniotic rupture of the bladder was evocated. Radiologic and pathologic postnatal studies concluded to a complicated cloacal malformation.