1Mechanical factors of bone change - over and osteoporosisGUO Shifu119-1232Progress of clinical treatment and research of osteoporosis The use of ultrasound examination for osteoporosisYANG Bo, ZHAO Liang, LUO Xianzheng124-1283The prediction of sinking of the necrosed femoral head and the selection of treatment methods for its preservationLI Zirong129-1314Analysis of the Causes of Misdiagnosis in Primary Tumors of the Acrum132-1335Toxic side - effects during chemotherapy of malignant bone tumors and its managementGUO Yi, YANG Rongli134-1406The use of poly microsome in chemotherapy for malignant tumorsTANG Xiaodong, GUO Wei, XU wanpeng141-1467Classification of bone tumors and several hot spot problemsBI Wuchan147-1508Misdiagnosis of primary malignant lymphoma of bone - a case reportHUANG Gin, ZHU Zhigang, LI Zhongqi151-1529MRI manifestations surrounding the edematous region of malignant bone tumors, the mechanism and its significance153-15610The proper use of statistics in medical science and medical writtingsHU Liangping157-15911Investigation of the problem of lower limb amputation caused by vascular disordersCUI Shouchang, ZHAO Li, WANG Zixu160-16412The determation of biologic activities of in vitro cultured human osteoblasts of different age groups165-16813The effect of glucocorticords on bone marrow stromal cell proliferation and differentiation169-17114Reversion of Multi - drug Resistance in Osteosarcoma Cell by PSC833172-177