Osteosarcoma metastasis to the heart caused by tumor thrombosis is very rar
e. A 7-year-old girl with an osteosarcoma of the right humerus, refused the
treatment, at first, then, 1 year later, referred to the hospital with met
astasis to the heart. The mass invading the pulmonary arteries was successf
ully removed with open-heart surgery.