Antenatal sonographic findings of right pulmonary agenesis with ipsilateral microtia: a possible new laterality association.

Right pulmonary agenesis is a rare congenital malformation which results in secondary dextrocardia in situs solitus. Ipsilateral microtia in this context composes a laterality syndrome. The prenatal sonographic findings of this abnormality have not been previously reported. We describe the association of dextrocardia in situs solitus, intact diaphragm and right microtia. This was sonographically diagnosed at mid-gestation in an euploid fetus. Surgical evacuation of the pregnancy confirmed the external malformation. Laterality association should be assessed in a fetus with sonographic findings of pulmonary agenesis. The differential diagnosis and updated literature review is presented. Copyright (C) 2001 John Wiley & Sons, Ltd.