A 68-year-old man was admitted to our department with severe dyspnea and hemodynamic instability. The initial echocardiogram revealed a massive pericardial effusion with signs of tamponade. Urgent pericardiocentesis was performed. The cytological examination of the pericardial fluid was negative for malignant cells but the pre-discharge transthoracic echocardiogram depicted a heterogeneous tissue (mass) in the right atrium. The subsequent transesophageal echocardiogram revealed a large sessile heterogeneous mass adherent to the right atrial free wall, extending into the inferior vena cava... (excerpt
