Bone cancer is the uncontrolled cell division in the bone, making a tissue mass to be formed. Most bone tumors are not cancer, which means they are benign. The cancer which spreads (metastasizes) to the bones from other areas of the body like the lungs, prostate or breast is called metastatic cancer, and is named for the tissue or organ in which the problem started. This is the forum for discussing anything related to bone cancer