A primary cardiac osteosarcoma: Case report and review of the literature.

Primary cardiac osteosarcoma is a rare and aggressive neoplasm that can be difficult to diagnose. We report a case of a previously healthy 49-year-old woman who presented with dyspnea, atrial flutter, and heart failure. A mass was visualized in her left atrium by echocardiography and cardiac computed tomography, and the diagnosis of cardiac myxoma was raised.