A 36-Year-Old Male With a Cardiac Mass Invading the Inferior Vena Cava
A previously healthy 36-year-old male presented with a one-month history of shortness of breath and fatigue. Cardiovascular examination revealed jugular venous distension (JVD) and grade II/IV mid diastolic murmur at the right lower sternal border. Routine laboratory studies, electrocardiogram, and chest X-ray were all normal. A transthoracic echocardiogram (TTE) showed a large mass, measuring 5.5x5 cm occupying the right atrium (Figure 1). A computed tomography (CT) scan of the chest and abdomen revealed a heterogeneous mass in the right atrium invading the inferior vena cava (IVC) (Figure 2). Two days later, he underwent surgical removal of the mass (Figure 3).
Which of the following describes your diagnosis?