Fetal ultrasound provides the capacity for early detection of a variety of
congenital heart diseases. We report a case of aneurysmal dilatation of a p
atent ductus arteriosus detected in utero and subsequently confirmed by tra
nsthoracic echo cardiography in the neonatal period. Prompt recognition of
the ductus aneurysm with resultant surgical ligation may have averted poten
tially serious complications from this condition.