Successful Complete Resection of Primary Cardiac Synovial Sarcoma Invading Right Atrium Wall

A 48-year-old man presented with several months of dyspnea and edema. He had no medical history. Transthoracic echocardiography showed a large mass in the tricuspid orifice. Enhanced computed tomography revealed that the mass had extended outside the heart by breaking though the right atrium wall. Hemodynamics has not collapsed yet, but his symptoms were rapidly worsening. He underwent emergency surgery, and complete resection was achieved. The pathologic diagnosis was primary cardiac synovial sarcoma. There were no signs of recurrence or metastasis 6 months after the surgery without additional treatment. Cardiac tumors are rare and develop silently, so they can be easily missed. Computed tomography and echocardiography provide much information quickly and help us to comprehend general condition. This case highlights their efficiency and the importance of early detection.