Fetal gastric pseudomasses.

Discrete echogenic areas of 4-12 mm were observed in the fetal stomach on seven prenatal sonograms. The finding was incidental and solitary during the second trimester in six normal pregnancies. It was noted during the third trimester in a case of meconium peritonitis. These echogenic areas displayed a homogeneous texture. They disappeared on repeat prenatal examination in six patients who did not reveal any gastrointestinal symptoms on postnatal follow-up. Although their origin is not certain, these fetal gastric pseudomasses should be interpreted cautiously.