A patient with bilateral superior and inferior caval veins.

We present a case with a very uncommon form of anomalous connection: a normal systemic venous connection to the right atrium existing in combination with left superior and inferior caval veins draining into the left atrium (associated with a large ostium primum atrial septal defect). To our knowledge the present report concerns the third case with this very rare congenital anomaly diagnosed during life.