11-month-old male infant with polysplenia syndrome operated for common atrioventricular canal.Findings: Thoracic CT scan in injected axial section showing a mesocardia with the descending aorta (f), the azygos vein on the left (g) and agenesis of the inferior vena cava.Technique: Philips, 23 mL IV ultravist 300, kV 110, mA 93.