Bone cancer occurs when there is uncontrolled growth of cells in the bones. Abnormal cell division leads to formation of tissue mass known as tumor. The cancerous cells can attack the neighboring body parts and the cancer spreads in the whole body. Uncontrolled cell growth can start in bones or cancerous cells from other body parts can attack the bone. The reason of bone cancer remains a mystery. Genetic causes and bone breakdown increase the risk of this cancer. Radiation, injury and family history are other factors that cause bone cancer. We will tell you about some facts of bone cancer. Following are some interesting facts about bone cancer.