A finding about one or more characteristics of bone cancer, following the rules of the TNM AJCC v8 classification system. This classification system applies to osteosarcoma, chondrosarcoma, Ewing sarcoma, spindle cell sarcoma, hemangioendothelioma, angiosarcoma, fibrosarcoma/myofibroid sarcoma, chordoma, adamantinoma, and other cancers arising in the bone. It does not apply to primary malignant lymphoma of the bone and multiple myeloma. (from AJCC 8th Ed.) [from NCI]