Malrotation in newborns following antenatal diagnosis of intra-abdominal cyst.

Two newborn girls had malrotation, small bowel in a subdiaphragmatic location on the right and leftward displacement of the liver. On antenatal scans, each had been diagnosed as having a large intra-abdominal cyst, but this had disappeared in both by the time of delivery. Both infants were asymptomatic at birth. One baby had a wrinkled abdominal wall, which is typically a component of prune belly syndrome. Both babies underwent Ladd procedure for their malrotation. In one, plate-like calcification over the hepatic capsule was the only residue of the previous cyst. In the other, mesenchymal hamartoma of the liver was diagnosed from histology of a collapsed adherent cyst.