Tumor Type                                            Tissue of Origin
Bone
Chondrosarcoma                                      Cartilage
Osteosarcoma                                          Bone
Ewing's sarcoma                                      Probably neural crest (primitive nerve)
Fibrosarcoma                                           Connective (fibrous) tissue
Soft Tissue
Fibrosarcoma                                           Connective (fibrous) tissue
Liposarcoma                                             Fat
Rhabdomyosarcoma                                  Skeletal muscle
Synovial sarcoma                                      Membranes lining joints
Neurofibrosarcoma                                    Nerve structures
Angiosarcoma                                           Blood vessels
Leiomyosarcoma                                       Smooth muscle,  such as found in
                                                                  the wall of the bowel