A persistent right umbilical vein poses challenges for stent placement in the ductus venosus

We report a case of prenatally diagnosed asplenia syndrome complicated by an infracardiac type total anomalous pulmonary venous connection. Stenting the ductus venosus through the umbilical vein was unsuccessful owing to the persistence of the right umbilical vein. Umbilical veins can develop various anomalies. When the fetus is planned for catheter intervention immediately after birth, the umbilical vein structure should be evaluated at the prenatal stage.