Superior caval vein partially overriding the interatrial septum-A fetal echocardiographic sign of superior sinus venosus defect. Reporting its rare association with coarctation of aorta in a fetus and its outcome.

Prenatal diagnosis of superior sinus venosus defect has never been reported in the literature. I describe here an echocardiographic sign which is helpful in diagnosing this defect in a 35 + 2 weeks fetus and its rare association with coarctation of aorta.