1Clinical research of bone tumorsWANG Zhen481-4832Computer-assisted precise resection of high-level sacral tumors and reconstruction of defectsDING Huan-wen, JIA Jun-feng, SHEN Jian-jian, TU Qiang, WANG Hong, LIU Hui-liang, YU Guang-wen, WANG ying-jun, CHEN Xiao-feng484-4893The postoperative recurrence of advanced osteosarcoma:3 cases report with a review of literatureYU Xiu-chun, WU Su-jia, WANG Xu-quan, XU Song-feng, XU Ming, YUAN Ye490-4944A comparative study on CT and pathological examinations of intramedullary extension of appendicular ;osteosarcomasDENG Zhi-ping, DING Yi, SU Yong-bin, NIU Xiao-hui495-4985Clinical application of pathological basis of the nuclear magnetic reaction zone of osteosarcomaZHANG Qing-xi, GUO Dong499-5026SigniifcanceofquantitativeanalysisofenhancedCTscaninthequalitativediagnosisofthegiantcelltumorof ;the boneLI Xiao, CHENG Xiao-guang, LU Zhan-xing, CHEN Xin-hui, SU Yong-bin, SUN Wei-jie, WANG Ling, LI Jia-lu503-5087Results evaluation of hormone therapy of the bone cystsLIU Wen-sheng, NIU Xiao-hui, DENG Zhi-ping, LI Yuan, YU Feng, WANG Tao, YANG Fa-jun509-5128Hemivertebra resection using trephine for the treatment of congenital fully-segmented hemivertebra spinal ;scoliosisWANG Hui, DING Wen-yuan, MA Lei, YANG Da-long, ZHANG Di, SUN Ya-peng, ZHANG Wei, SHEN Yong, ZHANG Ying-ze513-5179Surgical treatment of spinal tuberculosis with spinal cord injuryPAN Han-sheng, YUAN Zhen-chao, LIU Ru-zhuan, BAO Jie, TANG Xiao-ju, LIU Rui, QI Wen518-52110TechniqueandsignificanceofanteriorcruciateligamentreconstructionwithligamentremnantspreservedZHANG Shu, CHEN Chen, ZHANG Jun, WANG Wen, ZHOU Zhen-yu522-52511Exploration of the outcomes of different operative methods for old Monteggia fractures in childrenHUANG Jin-cheng, LIAN Hong-kai, BAI Yu, CHENG Fu-li, JING Xiao-bo, ZHANG Jing-yi, MA Fu-qiang526-53012Multifocal bone infarcts combined with bone tuberculosis:3 cases reportYU Yi-pin, WANG Chong, TIAN Zheng, SONG Xing-hua, LI Wen-ju531-53413Multiple lytic skeletal lesions resulted from primary hyperparathyroidism:2 cases reportZHEN Ping535-53714Reconstruction of the extensor mechanism with 4-layer polypropylene mesh after the excision of patellar tendon ;tumors:1 case reportYANG Cheng-tian, SU An-ping, FAN Ping, MA Wei-dong, QIAN Wen-xu, XU De-gang, WANG Wu538-540