Objective To explore the correlations between expression of miRNA-21 and PTEN and the invasion, metastasis of colorectal carcinoma.Methods The mRNA level of miRNA-21 and mRNA and protein levels of PTEN were assayed by real-time quantitative PCR and immunohistochemical methods respectively in 65 colorectal carcinoma specimen.Results The expression of miRNA-21 mRNA in cancer tissues was significantly higher than that in paracancerous tissues (t =3.50, P ＜ 0.05).Both mRNA and protein expressions of PTEN in tumor tissue were significantly lower than that in paracancerous tissues (t =7.35,t =12.23;P ＜ 0.05).Expression of miRNA-21 mRNA, PTEN mRNA and protein were obviously related with depth of invasion(F =18.36 ,F =17.26 ,F =12.83;P ＜ 0.05), Dukes stage (F =31.25, F =24.43, F =57.12;P ＜ 0.05) and lymph node metastasis (t =5.85, t =2.18, t =4.05;P ＜ 0.05), while it was not related to tumor differenciation and tumor location (F =7.39, t =4.62;F =7.78, t =1.29;F =5.14,t =1.37;P ＞ 0.05).Positive relation between miRNA-21 and PTEN in colorectal carcinoma was identified (r =-0.994, r =-0.927;P ＜ 0.05).Conclusion High expression of miRNA-21 and low expression of PTEN are both closely associated with invasion and metastasis of colorectal carcinoma.

The National Comprehensive Cancer Network (NCCN) has updated and released the NCCN esophageal and esophagogastric junction cancers clinical practice guidelines in oncology (version 3. 2022). Compared with the version 4 of the guidelines in 2021, the 3 versions in 2022 have some updates and revisions, mainly focusing on molecular marker detection, perioperative treatment, advanced immunotherapy, radiotherapy and other aspects. This article will interpret the main content of the new edition of the guidelines, in order to enhance the understanding of the guidelines and guide the clinical practice of diagnosis and treatment.

Objective:To investigate the short-term efficacy of left-sided three-port total laparoscopic distal gastrectomy (TPTLDG).Methods:The prospective randomized controlled study was conducted. The 68 patients undergoing laparoscopic distal gastrectomy in the First Affiliated Hospital of Air Force Medical University from March 2022 to March 2023 were collected. All patients were randomly assigned to the TPTLDG group with a double number, and to the five-port laparoscopic distal gastrectomy (FPLDG) group with a single number, respectively. Observation indicators: (1) grouping situations of the enrolled patients; (2) comparison of perioperative condition; (3) comparison of complications during postoperative 30 days; (4) comparison of pathological examination. Measure-ment data with normal distribution were represented as Mean± SD, and comparison between groups was conducted using the independent sample t test. Measurement data with skewed distribution were represented as M( Q1, Q3), and comparison between groups was conducted using the Mann-Whitney U test. Count data were described as absolute numbers, and comparison between groups was conducted using the chi-square test or continuous correction chi-square test. Comparison of ordinal data was analyzed using the non‐parameter rank sum test. Results:(1) Grouping situations of the enrolled patients. A total of 59 patients of gastric cancer were selected for eligibility. There were 40 males and 19 females, aged 59.00(52.00, 67.00)years. The gender (male, female), age, body mass index (BMI), Caprini score (≤2, ≥3), nutritional risk screening 2002 (<3, ≥3), Eastern Coopera-tive Oncology Group performance status (0, 1), preoperative hypersensitive C-reactive protein, preoperative IL-6, preoperative white blood cell count, preoperative albumin were 19, 11, 59.00(51.25,65.25)years, 21.92(20.93,22.73)kg/m 2, 7, 23, 24, 6, 18, 12, 0.78(0.78,1.46)mg/L, 3.07(1.50,10.56)μg/L, 6.07(4.94,7.19)×10 9/L, 44.30(40.83, 46.15) g/L in the 30 patients of TPTLDG group, versus 21, 8, 57.00(51.00, 67.00)years, 21.90(20.95, 23.35)kg/m 2, 11, 18, 24, 5, 17, 12, 1.13(0.78,11.40)mg/L, 5.56(1.88,15.12)μg/L, 5.54(4.71,6.70)×10 9/L, 43.55(40.25,44.88)g/L in the 29 patients of FPLDG group, showing no significant difference in the above indicators between the two groups ( χ2=0.557, Z=-0.444, -0.805, χ2=1.482, 0.074, 0.012, Z=-1.259, -1.262, -0.819, -1.199, P>0.05), confounding bias ensured comparability between the two groups. (2) Comparison of perioperative condition. The length of incision, time to removing drainage tube, IL-6 at postoperative day 3, cost of hospital stay were 6.65(6.48,6.93)cm, 3.00(0,3.00)days, 29.18 (13.67, 43.53)μg/L, 84 164.15(73 084.72, 96 782.14)yuan in the TPTLDG group, versus 8.00(7.50,8.35)cm, 3.00(3.00,4.00)days, 47.56(21.31,85.79)μg/L, 92 120.43(87 069.33, 113 089.74)yuan in the FPLDG group, showing significant differences in the above indicators between the two groups ( Z=-11.065, -2.141, -2.940, -2.220, P<0.05). (3) Comparison of complications during postoperative 30 days. The incidence rate of complications during postoperative 30 days was 30.00%(9/30) and 24.14%(7/29) in the TPTLDG group and FPLDG group, respectively, showing no significant difference between the two groups ( χ2=0.256, P>0.05). (4) Comparison of pathological examination. Cases with pathological N staging as 0 stage, 1 stage, 2 stage, 3 stage were 22, 2, 4, 2 in the TPTLDG group, versus 13, 7, 4, 5 in the FPLDG group, showing a significant difference between the two groups ( Z=-2.021, P<0.05). Conclusion:TPTLDG is safe and feasible for gastric cancer, with a good short-term efficacy.