The difference between chondrosarcoma and chondrosarcoma is that chondrosarcoma has bone destruction and enhancement on enhanced CT. Chondrosarcoma is a benign tumor mostly occurring in the metaphysis of long bones, localized as a clear bulge, the base is relatively wide, there is a cartilaginous cap, and it rarely recurs after surgical resection. The prognosis is good. Chondrosarcoma is expansive growth, visible chondrosarcoma basal bone destruction is translucent area, local calcification, there is obvious osteolytic destruction area, if the enhancement of CT can be seen in the tumor is strengthened. It is difficult to be completely resected by surgery, easy to recur, and the prognosis is poor. Therefore, the difference between chondrosarcoma and chondrosarcoma is whether or not there is bone destruction, and whether or not there is enhancement by enhanced CT.