Objective To investigate the clinical efficacy and safety of laparoscopic common bile duct exploration and primary common bile duct closure in the treatment of extrahepatic bile duct calculi.Methods The clinical data of 215 patients undergoing laparoscopic common bile duct exploration from October 2010 to December 2016 in Wuxi Xishan People' s Hospital were retrospectively analyzed.According to the different surgical methods,patients were divided into two groups:laparoscopic common bile duct exploration and primary common bile duct closure group(primary duct closure group,n =122) and laparoscopic common bile duct exploration group(T-tube drainage group,n =93).Operation time,intraoperative blood loss,recovery time of gastrointestinal tract,liver function in postoperative 1 week and hospitalization expenses,postoperative hospital stay(t test) and postoperative complications (x2 test) were compared.All patients were follow-up by clinic and telephone for 6 months.Measurement data were represented as ((x) ± s),and t test was used between the two groups,while count data using x2 or Fisher test.Results The postoperative hospital stay in primary duct closure group and T-tube drainage group was(8.5 ± 1.9) days and (12.5 ±2.4) days respectively,the difference between the two groups was statistically significant(P ＜ 0.05).The hospitalization costs in primary duct closure group and T-tube drainage group were (1 200 ± 300) yuan and (1 400 ± 500) yuan,the difference was statistically significant (P ＜ 0.05).Postoperative analgesia in primary duct closure group and T-tube drainage group was 11 cases and 32 cases statistically,and the difference was statistically significant (P ＜ 0.01).There were no significant difference in the operation time,intraoperative blood loss,recovery time of gastrointestinal tract,liver function 1 week after operation and postoperative bile leakage between the two groups (all P ＞ 0.05).There was no long-term complications in both groups after 6 follow-up months.Conclusion Under favorable operation technology and strictly grasp the surgical indications,laparoscopic common bile duct exploration and primary common bile duct closure has good clinical application value,and can embody minimally invasive and enhance recovery.

Biliary tract cancers (BTC) is a type of digestive tract malignant tumors that originate from biliary epithelial cells, is characterized by strong occult and highly invasive, and has a high mortality rate. Early detection and diagnosis are considered to be the key to obtaining radical surgical treatment. R0 resection is an effective measure to benefit patients with BTC. However, most of the patients present with local progression or associated distant metastasis, making it impossible to undergo radical surgical treatment. With existing diagnosis and treatment methods, the 5-year survival rate of patients is still very low. Therefore, how to improve the level of diagnosis and treatment of BTC, prolong survival, and improve the quality of life has become an urgent problem to be solved. In view of the characteristics of BTC and the continuous deepening of clinical pathological molecular research, adjuvant therapy, precisely targeted therapy, immunotherapy, and comprehensive treatment are currently considered to be standardized diagnosis and treatment models and research directions beyond surgery. Therefore, this article systematically analyzes the current research progress of BTC both domestically and internationally, aiming to provide strategies for the diagnosis and treatment of patients with BTC.

Objective:To investigate the expression and prognostic value of the Oct4 protein in colon cancer.Methods:Immunohistochemical technique was used to examine the expression of Oct4 protein in 89 left side colon cancer(LCC)tissues and 77 right-side colon cancer(RCC) tissues.The relationship among Oct4 expression,clinicopathological parameters,and the prognostic value of Oct4 in colon cancer was analyzed.Results:The positive rate of Oct4 protein in LCC was 68.54%,and that in RCC was 71.43%.There was no significant difference between the two values.In addition,Oct4 expression in RCC was positively correlated with histological grade,lymph node metastasis,and Dukes staging.By contrast,Oct4 expression in LCC was only positively correlated with histological grade and Dukes staging.In survival analysis, the 5-year survival rate of LCC was significantly higher than that in RCC(P<0.01).In patients with LCC,no obvious correlation was found between positive and negative Oct4 expression levels in OS.In patients with RCC,Oct4 overexpression indicated poor prognosis(P<0.05). Also,in Cox survival analysis,Oct4 overexpression indicated poor prognosis in RCC but not in LCC.Conclusion:These results indicated that Oct4 plays different roles in LCC and RCC.These roles can be used as theoretical basis for exploring new targets for the diagnosis and treatment of colon cancer.

Objective:To investigate the value of antioxidant-associated long non-coding RNAs(lncRNAs)risk score model in prognosis and the association with immune microenvironment of the gastric cancer patients.Methods:Gastric cancer transcriptome data and clinical information were downloaded from TCGA database.Antioxidant-associated lncRNAs were obtained by co-ex-pression analysis of lncRNAs and antioxidant genes.Risk score was constructed using univariate cox regression analysis and lasso regression analysis.Log-Rank test was used to compare the survival differences between two groups.Receiver operating characteristic curve(ROC)was used to assess the specificity and sensitivity of the prognostic risk score model.Nomogram was constructed com-bining risk score and clinical parameters.Immune cell infiltration was assessed by TIMER 2.0.Im-munotherapy sensitivity of each sample was analyzed at TIDE website.Results:A risk score in-cluding 12 IncRNAs was constructed by univariate cox regression analysis and lasso regression anal-ysis.The risk score was an independent factor influencing patient prognosis[HR=5.406(3.131～9.335),P＜0.001].Risk score was positively correlated with multiple suppressive immune cells infil-tration(M2 macrophage,tumor-associated fibroblast).Meanwhile,multiple aberrant expression of immune checkpoint genes and higher TIDE score were found in high-risk group,suggesting that high-risk groups may be more sensitive to immunotherapy.Conclusion:The antioxidant-associ-ated IncRNAs risk score is a good prognostic predictor and can act as a reference in individualized immunotherapy for gastric cancer patients.