Multiplanar reconstruction image from the chest computed tomography examination. The intravenous catheter (red arrow) travels through the left jugular vein and would be expected to continue in the left brachiocephalic vein (white arrow). In this case, however, the route of least resistance was in the retrograde direction through the anomalous left superior pulmonary vein (green arrow head). Also visible are the superior vena cava (VCS), the aortic arch (Ao), and the left and right pulmonary artery (LPA, RPA)