Right Outflow Tract Sarcoma Simulated Pulmonary Artery Thromboemboli

A 43-year-old man presented to our center with dyspnea NYHA functional class III as his chief complaint. The patient’s condition was good without any respiratory or circulatory distress. Physical examinations were also unremarkable, except for tachycardia. Electrocardiography showed sinus tachycardia with right ventricular strain pattern. Besides, transthoracic echocardiography showed that a large heterogonous mass (25*60mm) originated from right ventricular outflow tract had filled the main pulmonary artery and the right pulmonary artery branch (Figure 1, Video 1). Additionally, right heart chambers were enlarged and pulmonary artery pressure was estimated as 60 mmHg. Pulmonary CT angiography (256 slices) confirmed the presence of a mass in the pulmonary artery (Figure 2).