Osteosarcoma

It is a cancer that starts in the longer bones like legs and arms. Most common in knees and I am 60 percent sure I probably have it. E
.Osteosarcoma (also called osteogenic sarcoma) is the most common type of cancer that starts in the bones. The cancer cells in these tumors look like early forms of bone cells that normally help make new bone tissue, but the bone tissue in an osteosarcoma is not as strong as that in normal bones