Figure 8a. Hemopericardium in a 23-year-old man with non-Hodgkin lymphoma who experienced acute retrosternal pain and dyspnea after central venous cannulation. (a, b) Axial CT images show hemopericardium (arrow in a) and small collections of extraluminal air ventral to the distal superior vena cava (arrowhead in b). These findings suggest that a perforation has occurred. (c) Coronal thin-slab MIP image shows the location of the central venous catheter after correction of the complication.