Antenatal ultrasonographic diagnosis of a congenital posterolateral diaphragmatic defect.

The antenatal ultrasonographic findings in a fetus with a left-sided congenital posterolateral diaphragmatic defect (CPLDD) are presented and discussed. Displacement of the heart towards the right and absence of a normally positioned fluid-filled stomach at repeated examinations are diagnostic. In the event of an intrathoracically displaced fetal stomach, which occurs in about 60% of the cases, a sonolucent area in the left chest may be found. In view of the dynamic nature of fetal stomach filling, more than one examination may be required to detect this feature. Antenatal recognition of congenital diaphragmatic hernia (CDH) has important consequences for perinatal management and can improve neonatal outcome.