The case report of a patient with metastatic osteogenic sarcoma of the right ventricle who had had an interscapulothoracic amputation in October, 1970, and a left lower lobectomy in June, 1973, for pulmonary metastasis is presented. The patient was hospitalized in October, 1974, with signs and symptoms of right ventricular outflow obstruction and arrhythmia, and cardiac workup established the presence of a right ventricular tumor. The lesion was successfully resected using cardiopulmonary bypass, and the diagnosis of metastatic osteogenic sarcoma was confirmed. The patient did well after the operation and returned to normal activity. She was placed on adjuvant Adriamycin (doxorubicin) chemotherapy, but 6 months later died of Adriamycin toxicity.