<unk>  is a bone sarcoma, a primary cancer composed of cells derived from transformed cells that produce cartilage. A<unk>  is a member of a category of tumors of bone and soft tissue known as sarcomas. About 30% of bone sarcomas are<unk> s. It is resistant to chemotherapy and radiotherapy. Unlike other primary bone sarcomas that mainly affect children and adolescents, a<unk>  can present at any age. It more often affects the axial skeleton than the appendicular skeleton.
Chondrosarcoma
Enchondroma
Fibrosarcoma
Myxoid cyst
Chondroma
Osteoblastoma
Liposarcoma
Synovial sarcoma