Figure 11c. Scimitar syndrome with partial anomalous venous return. Transverse CT scans obtained at the level (a) of the ventricles and (b) of the liver show anomalous pulmonary vein (arrow) entering the inferior vena cava (C) just below the junction with the right atrium. Note also slightly smaller right hemithorax and ipsilateral mediastinal shift. Right ventricle (V) is dilated due to left-to-right shunt. (c) Left oblique volume-rendered 3D CT image shows entire course of the anomalous vessel (arrow). Most of the right lung in this patient drained into the anomalous vein. Only a small part of the upper lobe drained normally. C = inferior vena cava.