1Commentary on relevant issues in the application of percutaneous endoscopic lumbar discectomy in ossifying secondary lumbar spinal stenosisLIU Jun-lin, KONG Qing-quanEditorial81-872Clinical effects of percutaneous endoscopic cervical discectomy for multiple-segments calcified cervical disc herniationHU Bao-shan, LIN Sheng-rong, SUN Nai-kun, RUI GangMinimally invasive spine surgery88-913A clinical study of percutaneous spinal endoscopy in the treatment of ossification of the thoracic ligamentum flavumWANG Ke-ran, LIAO Cong-gang, GAO Xiang, XIA Yu, ZHANG Xun, YAN Zheng-jian, TANG Kai-ying, DU Yu, CHEN LiangMinimally invasive spine surgery92-974Application of percutaneous spinal endoscopy in the treatment of thoracic spinal stenosisYANG Jun-song, CHU Lei, WANG Yong-feng, DENG Rui, LIU Peng, LIU Tuan-jiang, TIAN Fang, DENG Zhong-liang, HAO Ding-junMinimally invasive spine surgery98-1045Short-term efficacy in the treatment of lumbar posterior apophyseal ring separation by percutaneous endoscopic spine surgeryFENG Pin, ZHANG Bin, LIU Jun-lin, MA Jun-song, KONG Qing-quanMinimally invasive spine surgery105-1096Clinical observation of transdermal spinal endoscopy in the treatment of epiphysis of lumbar posterior vertebral bodyWANG Xiang-fu, CHEN Wei-guo, YE Bing-lin, LI Chen-xu, FAN You-fu, SUN Feng-qi, ZHAO Heng, ZHU Sheng-huMinimally invasive spine surgery110-1147Surgical management of percutaneous transforaminal endoscopic discectomy for lumbar disc herniation combined with vertebral osteochondrosisLI Ning, XU Bao-shan, XU Hai-wei, JIANG Hong-feng, LIU Yue, JI Ning, ZHANG Chun-hongMinimally invasive spine surgery115-1198Short-term clinical effectiveness of percutaneous endoscopy spine surgery for lumbar intraspinal bonyoccupying lesionMA Cheng, DING Qi-rui, CHE Hui, LIU Li-jia, LI You, ZHAO Feng, REN Yong-xinMinimally invasive spine surgery120-1269Surgical design and clinical application of percutaneous full-endoscopic lumbar decompression for lateral recess stenosis through articular processFU Yao, LIAO Wen-bo, WU Fu-jun, XIN Zhi-jun, SHI ChaoMinimally invasive spine surgery127-13110Advances in diagnosis and endoscopic treatment of lumbar disc herniation or lumbar spinal stenosis with posterior apophyseal ring separationPENG Zhi-yu, KONG Qing-quanReview132-13611Clinical practice and related research of lumbar topping-off surgeryWANG Wen-long, LIU Zheng, WU Si-junReview136-14012Research advances of posterior lumbar interbody fusion combined with unilateral or bilateral pedicle screw fixation in lumbar degenerative diseasesDING Yi, PAN Ai-xing, ZHANG Yang-pu, ZHANG Yao-shen, LIU Chang, ZHANG Li-ming, YANG Jin-caiReview141-14413Application of percutaneous transpedicular screw and rob to lever reduction and fixation in the treatment of thoracolumbar fractures by local anesthesiaZHU Nai-qiang, HOU Jing-yi, ZHAO Hai-yang, MA Gui-yun, CHEN Bin, SONG You-xin, LIU Jin-xinOriginal article145-14914Investigation of quality of life in patients with rheumatoid arthritis and analysis of the relationship between each dimension in quality of life and their clinical indicatorsLU Min-hui, ZHANG Qing, XU Peng-hui, GUO Juan, YE Bin, WANG Lei, ZHOU Hui-qiong, LI Sheng-guangClinical research and practice150-15415Percutaneous endoscopic treatment of dual segment lumbar spinal stenosis combined with intraspinal ossification: a case reportZHOU Qing, KONG Qing-quan, ZHANG Bin, FENG PinCase report155-160 