Imaging Findings

(A) Chest radiograph demonstrates a globular enlarged cardiac silhouette (arrows). Linear atelectasis is seen in the left lung. (B) Contrast-enhanced computed tomography (CT) through the right ventricle (soft-tissue window) shows a large pericardial effusion. A large mass is invading the right ventricle (arrow). (C) Contrast-enhanced CT through the caudal margin of the pericardium (soft-tissue window) shows an extensive amount of pericardial fluid. Although the fluid is predominantly of low density, a curvilinear area of high density is seen anterior to the inferior vena cava (IVC, arrow). (D) Contrast-enhanced CT (soft-tissue window) through the abdomen demonstrates a large mass occupying most of the right abdomen (long arrow). There is a resultant mass effect on the ascending colon and IVC. The density is heterogeneous, but there are extensive areas of very low density.

  Differential Diagnosis