Right ventricular mass: A tumor or thrombus

Cardiac mass is always challenging, specially in the right side of the heart that should raise suspicion of a malignancy. A 15-year-old poor growth and poor weight gain girl with dyspnea was examined in the emergency room. Transthoracic echocardiography revealed a large homogeneous mass in the RV apex which disappeared one week after intravenous heparin therapy. A trial of anticoagulation should be considered when the differential diagnosis is difficult and thrombus is a possibility.