[Diagnosis of duplicate superior vena cava]

Anomalies of the system vein entrance into the right atrium are rarity, particularly in the double superior vena cava. As an isolated anomaly it is asymptomatic. Throughout eight years period we have been making computed tomography checks of 4045 patients, and with five of them, meaning 1.2 promil we have discovered double superior vena cava as a random finding. The diagnosis was confirmed by means of a bi-cubital intravenous digital subtraction angiography. The diagnosis of these anomaly is significant for the differential diagnostics from tumor syndrome, as well as for prevention of surprises in studies of the mediastinum.