1Research advances and clinical application in functional imaging in orthopedicCHENG Xiao-guangEditorial577-5792The application value of the full view DR in measuring lower limb force lines of knee osteoarthritisFENG Qiang-qiang, QIE Hai-wei, WANG Wen-hai, ZHOU Feng-yun, CHENG Xiao-guang, XU LiOrthopaedic radiology580-5833Analysis of CT signs of calcification's regulation of the peri-sacroiliac joint ligamentsZHANG Dan, WANG Qi-jun, CUI Shu, MA Min, FENG Hui-jian, ZHAO Da-qing, LI Tong-tongOrthopaedic radiology584-5894Performance evaluation of upright CT and its application in the diagnosis of degenerative bone and joint diseasesWEN Kai-cheng, LIU Shuai, ZHANG Qi-lin, SUN Zhao-chang, LI Pei-ling, LI Song-bai, FAN Guo-guang, ZHU YueOrthopaedic radiology590-5955A comparative study on lumbar lordosis by weight-bearing and recumbent magnetic resonance imagingLI Kai, LI Xin-tong, GUO Zhe, XU Li, FENG Qiang-qiang, CHENG Xiao-guangOrthopaedic radiology596-6006Imaging features of clear cell sarcoma of soft tissueLI Yun-xin, ZHOU Zhu-ping, WANG Ai-jie, HUANG Ran-ran, ZHANG Guo-wei, SU Yong-binClinical research and practice601-6057Investigation of fracture healing time distribution and delayed healing factors after volar plate open reduction and internal fixation for distal radius fracturesGUO Yang, LIU KaiClinical research and practice606-6138Age-period-cohort analysis of disease burden of osteoarthritis at different sites in China from 1990 to 2019WANG Cheng-yan, AN Jing-nan, LIU Chang, GUO Song-hao, WANG Jing-boOriginal article614-6209Clinical and imaging features of giant cysticercosis of the hip joint:a case report and literature reviewYANG Chao, XIE JingOriginal article621-62610Imaging and pathological analysis of a case of primary pseudomyogenic hemangioendothelioma at the proximal FemurZHOU Xing-shun, GUO ZheCase report627-62911SAPHO syndrome detected after ovarian cancer surgery:a case reportWAN Xu-ming, HOU Yan-ling, WANG Zhi-jun, HOU Hong-junCase report630-63312Clinical efficacy of ulnar distal diaphyseal osteotomy and metaphyseal osteotomy in the treatment of ulnar impaction syndrome:a Meta analysisDING Jin-hui, WANG Qin, ZHANG Chong-yang, ZHANG Ming-yongMeta-analysis634-64213Research progress on the correlation between accessory navicular bone and flat footLIU Dong-xue, ZHAO Jin-cui, LIU Song-zhu, NI Dong-he, XIU Chao, YU YangReview643-64714Progress in the treatment of traumatic anterior glenohumeral dislocationLUO Jing-tao, ZHANG Xin-jun, WU Bo, WANG Zi-xin, WU Xiao-mingReview647-65515Current status and research progress of surgical treatment of recurrent patellar dislocationZENG Yong-tao, Nacikedaoerji, Refatinijiati, CHEN Hong-taoReview656-66116Research progress on the mechanisms of the tumor immune microenvironment and immunotherapy in osteosarcomaGUO Chao-fan, LI Li-junReview662-66617Research progress of endoplasmic reticulum stress and its role in osteosarcomaREN Jie, WEI WeiReview667-672 