Bone cancer is a rare type of cancer that can affect any bone in the body. However, it’s unusual for it to begin in your bones. It’s much more likely to have spread to your bones (metastasised) from cancer in another part in your body. The three most common primary bone cancers are; osteosarcoma, chondrosarcoma, and Ewing’s sarcoma. Other rare types include cell sarcomas (very similar to osteosarcomas, behave similarly and doctors treat them similarly), fibrosarcomas (rare, in middle-aged adults, thigh bone most commonly) and leiomyosarcomas (very rare type of spindle cell sarcoma).