Cancers that start in the bone are sarcomas, usually osteosarcoma, chondrosarcoma or Ewing's sarcoma. Other cancers may spread (metastasize) to the bone, but they are still called by their original name. An example would be breast cancer that has spread to the bones.
July is Sarcoma Awareness Month, and our ribbon is yellow. I'm in remission from another kind of sarcoma and I'm on the board of the Sarcoma Alliance. www.sarcomaalliance.org