Sonolucencies in fetal and infant abdomen: implications for management.

The increased use of prenatal and antenatal ultrasonography will detect predictably abnormalities of fetal and infant anatomy not assessed or suspected previously. Three cases are presented illustrating similar ultrasonographic findings with different diagnoses and prognoses, and comparisons are made with other cases reported in the literature. Caution should be used in interpreting sonolucencies in fetal and infant abdomen to be diagnostic of a particular defect since further studies are required to define properly the specific abnormality so that proper treatment can be instituted.