Chondrosarcoma is occurred in cartilage cells of the embryo or intergovernmental organizations of malignant bone tumors. According to a process is divided into primary and secondary. Primary course of short, rapid development, poor prognosis. The secondary benign tumor or from other diseases, such as cartilage tumor, osteochondroma, bone of malignant malformation, the course long, slow development, a better prognosis. According to the tumor site, can be divided into central and peripheral chondrosarcoma of chondrosarcoma. The former took place in the bone marrow cavity, which occurred in cortical bone surface.
