[Primary bone and joint tumor--statistical analysis of 571 cases].

This paper analyses 571 cases of primary bone and joint tumors diagnosed by histopathology, excluding the tumor-like lesions. They were divided into two groups: the benign (412 cases, 72.15%) and the malignant (159 cases, 27.85%). The susceptible ages were between 15-29 years and the susceptible location of these tumors were femur and tibia often on the right side. There were more males than the females. The frequencies in the two groups are as follows: In the benign group, osteoma had the highest incidence and then, with decreasing frequencies: osteochondroma, chondroma, synovioma, giant cell tumor, ossifying fibroma, osteoid osteoma, chondromyxoid fibroma. In the malignant group, the highest incidence was in the osteosarcoma, and then synoviosarcoma, chondrosarcoma, malignant giant cell tumor, Ewing's tumor, fibrosarcoma, osteomyeloma. The sequence of the incidence was basically similar to that reported abroad and at home. The pathogenesis of several kinds of bone tumor are discussed.