We report magnetic resonance imaging (MRI) findings of a very unusual venous anomaly case. A 5-year-old boy who had surgical repair of coarctation of the thoracic aorta was referred to our department for evaluation of an enlarged venous structure anterior to the aorta, which had been noted during the surgery. Contrast enhanced dynamic MRI revealed partial anomalous pulmonary venous return to the left azygos vein, double inferior and superior vena cava with the left azygos continuation of the left superior vena cava. The recognition of venous anomalies allows correct planning of surgical and interventional procedures. MRI is a valuable imaging tool providing detailed anatomical information.