1Hotspots of surgery for breast cancer:The st.Gallen International Conferencesof Breast Cancer 2019HU Jiejie, YU Yang, WANG Xiaojia397-4002Analysis of the expression of circRNA in breast cancer tissues by GEO databaseZHANG Heda, LI Wei, ZHONG Shanliang, JIANG Linhong, LI Jian, TANG Jinhai401-4053Effect and prognostic factors of systemic chemotherapy followed by surgical resection on survival in patients with stage Ⅳ gastric cancerCHEN Jinhu, YE Qing, HUANG Feng406-4104Application of designed dissection techniques based on the classification of inferior parathyroid gland in central neck dissection for papillary thyroid carcinomaHOU Dawei, XU Hai'e, YUAN Bing, LIU Jianhui, LU Yibing, LIU Ming, WANG Zijun, QIAN Zhuyin411-414,4195Correlation between CT features and EGFR gene mutations inpatients with stage IA peripherallung adenocarcinomaKANG Zheng, ZHANG Lei, XIE Xiaodong, SHEN Wenrong415-4196Analysis on pathogen characteristics and risk factors of intracranial infection after intracranial tumor resectionLI Yuanye, FENG Yan, SUN Chunyan420-4237Predictive value of preoperative peripheral blood lymphocyte-to-monocyte ratio in cervical squamous carcinomaHUANG Xun, XIE Jian424-4288Efficacies of Extended Versus Standard Lymphadenectomy in Pancreatoduodenectomy for Pancreatic Head AdenocarcinomaWANG Wei, TAO Jing, TANG Zhigang, WU Lun, YE Lin, YAO Lichao429-4329The outcome of radical operation ( D2) for elderly patients with gastric carcinomaYUAN Jianwei, HE Xiaohu, ZHU Lei, MA Jun, ZHOU Chaoping, ZHANG Yaming433-43710Efficacy of bevacizumab combined with cisplatin in the treatment of recurrent malignant gliomaWANG Liang, GAO Benlin, LIU Nan438-44111Protective effect of Nanocarbon on parathyroid gland and recurrent laryngeal never in thyroid cancer surgeryWANG Guilin, FENG Ruifa442-445,44912A correlation analysis between brain metastases from lung cancer and serum NSE expression in patientsLIU Juan, LYU Xingxing, CHEN Juan, YU Danfeng446-44913Renal chromophobe cell carcinoma: clinical analysis and review of 28 casesZHOU Yaojun, HE Xiaozhou, XIA Wei, CUI Li, XU Renfang, LU Hao, XUE Dong450-45214Incidence and influencing factors of intestinal obstruction after laparoscopic surgery for colorectal cancerHAO Zhi, GONG Haifeng, ZHEN Hongbo453-45615Clinical efficacy of endocrine therapy and transurethral plasmakinetic prostatectomy combined with chemotherapy in the treatment of advanced prostate cancerHUANG Haiyuan, LI Jinxi, CHEN Zhengjin457-45916Research progress of liquid biopsy in targeted therapy of lung cancerZHAO Ling, YI Shanyong, YAN Xiaoqian, GAO Hui460-46517Progress of precise surgery in the treatment of osteosarcomaLUO Shanchao, ZOU Chongqi, LIANG Zhou, ZHAO Jinmin466-469,47518Current status of cryoablation and surgical therapy for lung cancerFU Yongqiang, LIU Bing470-47519Effect analysis of FTS-CIS mode applied to postoperative intervention in patients with miRNA colorectal cancerJIANG Yan, YIN Hongzhuan476-47920Application of standardized nursing program in patients with hypocalcemia after thyroid tumor surgeryZHANG Linhua, HU Tingting, LIU Fangzhou, YANG Cuimei, ZHANG Yuan480-484 