Objective:To compare the short-term efficacy of Kamikawa anastomosis and double-tract reconstruction (DTR) after proximal gastrectomy.Methods:This was a propensity score matched, retrospective, cohort study. Inclusion criteria comprised age 20–70 years, diagnosis of gastric cancer by pathological examination of preoperative endoscopic biopsies, tumor diameter ≤4 cm, and location in the upper 1/3 of the stomach (including the gastroesophageal junction), and TNM stage IA, IB, or IIA. The study cohort comprised 73 patients who had undergone laparoscopic proximal gastric cancer radical surgery in the Department of Gastroenterology, Tangdu Hospital, Air Force Medical University between June 2020 and February 2023, 19 of whom were in the Kamikawa group and 54 in the DTR group. After using R language to match the baseline characteristics of patients in a ratio of 1:2, there were 17 patients in the Kamikawa group and 34 in the DTR group. Surgery-related conditions, postoperative quality of life, and postoperative complications were compared between the two groups.Results:After propensity score matching, there were no statistically significant differences in baseline data between the two groups ( P>0.05). Compared with the DTR group, the Kamikawa group had longer operative times (321.5±15.7 minutes vs. 296.8±26.1 minutes, t=32.056, P<0.001), longer anastomosis times (93.0±6.8 minutes vs. 45.3±7.7 minutes, t=56.303, P<0.001), and less bleeding (76 [54~103] mL vs.112 [82~148) mL, Z=71.536, P<0.001); these differences are statistically significant. There were no statistically significant differences between the two groups in tumor size, time to first postoperative passage of gas, postoperative hospital stay, number of lymph nodes removed, duration of lymph node dissection, or total hospitalization cost (all P>0.05). The median follow-up time was 6.1 ± 1.8 months. As to postoperative quality of life, the Kamikawa group had a lower rate of upper gastrointestinal contrast reflux than did the DTR group (0 vs. 29.4% [10/34], χ 2=6.220, P=0.013); this difference is statistically significant. However, differences between the two groups in quality of life score on follow-up of 3 months and 6 months on the Gastroesophageal Reflux Disease (GERD) scale were not statistically significant (all P>0.05). The incidence of postoperative complications was 2/17 in the Kamikawa group, which is significantly lower than the 41.2% (14/34) in the DTR group (χ 2=4.554, P=0.033). Conclusion:Kamikawa anastomosis and DTR are equally safe and effective procedures for reconstructing the digestive tract after proximal gastric surgery. Although Kamikawa anastomosis takes slightly longer and places higher demands on the surgical team, it is more effective at preventing postoperative reflux.

The application of proximal gastrectomy for suitable upper gastric cancer and AEG patients is increasing along with the promotion of the concept and technology for function-preserving partial gastrectomy. The following problems such as postoperative reflux esophagitis and anastomotic stenosis naturally become the focus of academic field. Based on the understanding of the anti-reflux structure and function of the esophagogastric junction, scholars have successfully established some representative esophagogastric anastomosis methods with additional mechanical anti-reflux barrier, including gastric tube reconstruction, side overlap esophagogastrostomy, and double flap technique. Subsequently, a series of improved esophagogastric reconstruction methods have been derived. At present, the recognized ideal reconstruction method has not yet been established, and there are also misunderstandings in related concepts and cognition. Based on the literatures and the authors' own practical experience, this paper draws on the research results in the field of surgical treatment for reflux esophagitis, and discusses the theoretical basis, key details and anti-reflux effect of the above-mentioned digestive tract reconstruction methods after proximal gastrectomy, as well as the possible problems in the exploration of innovative surgical methods at home and abroad.

Objective:To compare the short-term efficacy of Kamikawa anastomosis and double-tract reconstruction (DTR) after proximal gastrectomy.Methods:This was a propensity score matched, retrospective, cohort study. Inclusion criteria comprised age 20–70 years, diagnosis of gastric cancer by pathological examination of preoperative endoscopic biopsies, tumor diameter ≤4 cm, and location in the upper 1/3 of the stomach (including the gastroesophageal junction), and TNM stage IA, IB, or IIA. The study cohort comprised 73 patients who had undergone laparoscopic proximal gastric cancer radical surgery in the Department of Gastroenterology, Tangdu Hospital, Air Force Medical University between June 2020 and February 2023, 19 of whom were in the Kamikawa group and 54 in the DTR group. After using R language to match the baseline characteristics of patients in a ratio of 1:2, there were 17 patients in the Kamikawa group and 34 in the DTR group. Surgery-related conditions, postoperative quality of life, and postoperative complications were compared between the two groups.Results:After propensity score matching, there were no statistically significant differences in baseline data between the two groups ( P>0.05). Compared with the DTR group, the Kamikawa group had longer operative times (321.5±15.7 minutes vs. 296.8±26.1 minutes, t=32.056, P<0.001), longer anastomosis times (93.0±6.8 minutes vs. 45.3±7.7 minutes, t=56.303, P<0.001), and less bleeding (76 [54~103] mL vs.112 [82~148) mL, Z=71.536, P<0.001); these differences are statistically significant. There were no statistically significant differences between the two groups in tumor size, time to first postoperative passage of gas, postoperative hospital stay, number of lymph nodes removed, duration of lymph node dissection, or total hospitalization cost (all P>0.05). The median follow-up time was 6.1 ± 1.8 months. As to postoperative quality of life, the Kamikawa group had a lower rate of upper gastrointestinal contrast reflux than did the DTR group (0 vs. 29.4% [10/34], χ 2=6.220, P=0.013); this difference is statistically significant. However, differences between the two groups in quality of life score on follow-up of 3 months and 6 months on the Gastroesophageal Reflux Disease (GERD) scale were not statistically significant (all P>0.05). The incidence of postoperative complications was 2/17 in the Kamikawa group, which is significantly lower than the 41.2% (14/34) in the DTR group (χ 2=4.554, P=0.033). Conclusion:Kamikawa anastomosis and DTR are equally safe and effective procedures for reconstructing the digestive tract after proximal gastric surgery. Although Kamikawa anastomosis takes slightly longer and places higher demands on the surgical team, it is more effective at preventing postoperative reflux.

The application of proximal gastrectomy for suitable upper gastric cancer and AEG patients is increasing along with the promotion of the concept and technology for function-preserving partial gastrectomy. The following problems such as postoperative reflux esophagitis and anastomotic stenosis naturally become the focus of academic field. Based on the understanding of the anti-reflux structure and function of the esophagogastric junction, scholars have successfully established some representative esophagogastric anastomosis methods with additional mechanical anti-reflux barrier, including gastric tube reconstruction, side overlap esophagogastrostomy, and double flap technique. Subsequently, a series of improved esophagogastric reconstruction methods have been derived. At present, the recognized ideal reconstruction method has not yet been established, and there are also misunderstandings in related concepts and cognition. Based on the literatures and the authors' own practical experience, this paper draws on the research results in the field of surgical treatment for reflux esophagitis, and discusses the theoretical basis, key details and anti-reflux effect of the above-mentioned digestive tract reconstruction methods after proximal gastrectomy, as well as the possible problems in the exploration of innovative surgical methods at home and abroad.

Objective:To analyze the clinical characteristics, treatment methods, and efficacy of hemorrhagic supratentorial deep brain arteriovenous malformation(BAVM) in children.Methods:Clinical data of 12 pediatric patients with hemorrhagic supratentorial deep BAVM diagnosed and treated in the Department of Neurosurgery, Children′s Hospital of Nanjing Medical University from May 2020 to January 2023 were retrospectively analyzed.Among them, there were 7 males and 5 females, aged range from 4.8 to 14.1(9.6±3.2) years old.On the day of onset, the children underwent lateral external ventricular drainage, combined surgery, evacuation of intracranial hematoma, or medication to reduce intracranial pressure, based on the location of intracranial hemorrhage, degree of neurological dysfunction, and angioarchitecture of BAVM.Afterwards, the patients were given embolization with stable physical signs.The data of 12 patients were analyzed retrospectively, including clinical manifestations, imaging features, and treatment outcomes.Results:All 12 children started with intracranial hemorrhage.Digital subtraction angiography confirmed the diagnosis of deep BAVM, with 6 cases having the niduses in the splenium of the corpus callosum, 3 cases in the body of the corpus callosum, 2 cases in the basal ganglia area, and 1 case in the thalamus.Ten children had an intracranial hemorrhage in the lateral ventricle.Among them, 6 children underwent lateral external ventricular drainage on the day of onset and then were given BAVM embolization 7-14 days after onset; 1 patient experienced intraoperative bleeding, but showed no neurological dysfunction after surgery; 1 patient experienced temporary facial numbness; 1 patient with massive hemorrhages in the occipital lobe and lateral ventricle underwent combined surgery to embolize the BAVM and remove intracranial hematoma on the first day of onset; 1 patient suffered from basal ganglia hemorrhage with lateral intraventricular hemorrhage, and evacuation of intracranial hematoma was performed on the day of onset, and BAVM embolization was performed 7 days after surgery.Three months after combined surgery and embolization and 3 years after gamma knife treatment, the digital subtraction angiography was re-performed, and results showed that 5 cases, including 1 child undergoing combined surgery, was cured through a single interventional embolization, and 1 case was cured by a single embolization combined with gamma knife treatment.Conclusions:Intracranial hemorrhage caused by deep BAVM in children is mainly located in the lateral ventricle.In the acute phase, the main focus is on treating intracranial hypertension caused by obstructive hydrocephalus and intracranial parenchymal hematoma.Interventional embolization is safe and effective in the treatment of deep BAVM in children.

Objective:To investigate the effect of neoadjuvant chemotherapy on the safety of laparoscopic D 2 radical resection and prognosis of patients with locally advanced gastric cancer. Methods:The propensity score matching and retrospective cohort study was conducted. The clinicopathological data of 351 patients with locally advanced gastric cancer who underwent laparos-copic D 2 radical resection in the Second Affiliated Hospital of Air Force Medical University from December 2016 to December 2021 were collected. There were 256 males and 95 females, aged (58±9)years. Of the 351 patients, 124 cases undergoing neoadjuvant chemotherapy were divided into the neoadjuvant chemotherapy group, 227 patients undergoing postoperative adjuvant chemotherapy were divided into the adjuvant chemotherapy group. Observation indicators: (1) propensity score matching and comparison of general data of patients between the two groups after matching; (2) effect evaluation of neoadjuvant chemotherapy; (3) intraoperative and postoperative situations; (4) postoperative histopathological examinations; (5) follow-up. Propensity score matching was done by the 1∶1 nearest neighbor matching method. Measurement data with normal distribution were represented as Mean± SD, and comparison between groups was conducted using the t test. Measure-ment data with skewed distribution were represented as M(range) or M( Q1, Q3), and comparison between groups was conducted using the rank sum test. Count data were described as absolute numbers, and comparison between groups was conducted using the chi-square test. The Kaplan-Meier method was used to draw survival curves, and the Log-Rank test was used for survival analysis. Results:(1) Propensity score matching conditions and comparison of general data of patients between the two groups of patients after matching. Of 351 patients, 154 cases were successfully matched, including 77 cases in the neoadjuvant chemotherapy group and 77 cases in the adjuvant chemotherapy group. The elimination of gender, age, preoperative body mass index, clinical T staging and clinical N staging confounding bias ensured comparability between the two groups after propensity score matching. (2) Effect evaluation of neoadjuvant chemotherapy. Of the 77 patients receiving neoadjuvant chemotherapy, none of patient achieved complete response, 26 patients achieved partial response, 46 patients showed stable disease, 5 patients had progression of disease, showing the objective response rate as 33.8%(26/77) and the disease control rate as 93.5%(72/77). There were 15 males and 11 females sensitive to neoadjuvant chemotherapy, while 46 males and 5 females not sensitive, showing a significant difference between them ( χ2=11.05, P<0.05). (3) Intra-operative and postoperative situations. The operation time, volume of intraoperative blood loss, cases with intraoperative blood transfusion, time to postoperative first flatus, time to postoperative first liquid food intake, duration of postoperative hospital stay, cases with postoperative immediate complications, cost of hospital stay were (308±71)minutes, 100(range, 20?600)mL, 5, 3.0(range, 2.0?10.0)days, 4.0(range, 2.0?12.0)days, 9.0(range, 4.0?31.0)days, 7, 7.96(7.37,8.58) ten thousand yuan in patients of the neoadjuvant chemotherapy group, versus (296±67)minutes, 100(range, 20?500)mL, 4, 3.5(range, 1.0?14.0)days, 4.0(range, 2.0?15.0)days, 8.0(range, 5.0?45.0)days, 11, 8.18(7.52,9.19) ten thousand yuan in patients of the adjuvant chemotherapy group, showing no signifi-cant difference in the above indicators between the two groups ( t=1.13, Z=?0.37, χ2=0.12, Z=?1.26, ?0.33, ?0.70, χ2=1.01, Z=?1.04, P>0.05). (4) Postoperative histopathological examinations. Results of postoperative histopatho-logical examinations showed that all 154 patients achieving R 0 resection. Cases with pathological T staging as stage T1, stage T2, stage T3, stage T4, cases with pathological N staging as stage N0, stage N1, stage N2, stage N3, number of positive lymph nodes, cases with human epidermal growth factor receptor 2 (negative, positive) were 3, 7, 5, 62, 27, 19, 19, 12, 1(range, 0?28), 59, 18 in patients of the neoadjuvant chemotherapy group, versus 0, 0, 2, 75, 17, 15, 21, 24, 3(range, 0?31), 44, 33 in patients of the adjuvant chemotherapy group, showing significant differences in the above indicators between the two groups ( Z=?3.39, ?2.55, ?3.12, χ2=6.60, P<0.05). (5) Follow-up. Of the 154 patients, 143 patients were followed up for 37(range, 5?69)months. The 3-year overall survival rate and 3-year disease-free survival rate was 72.1% and 70.0%, respectively, in patients of the neoadjuvant chemotherapy group, versus 74.8% and 76.6% in patients of the adjuvant chemo-therapy group, showing no significant difference in the above indicators between the two groups ( χ2=0.14, 0.60, P>0.05). Conclusions:Compared to postoperative adjuvant chemotherapy, neoadjuvant chemotherapy does not bring additional surgical risks, but can reduce the tumor stage of patients who underwent laparoscopic D 2 radical resection for locally advanced gastric cancer. However, it does not show any advantage in improving survival of patients.

Laparoscopic radical resection of left hemicolon cancer is difficult in lymph node dissection, splenic flexure dissociation and digestive tract reconstruction. The high resolution recognition ability of 4K laparoscopic system can help complete mesocolic excision and neuroprotec-tion of the left colon. The authors discuss the key points of 4K totally laparoscopic radical resection of left hemicolon cancer and intraperitoneal overlap digestive reconstruction through surgical examples.

Radical resection is still the main method to cure gastric cancer. Lymph node metastasis is a common metas-tatic pattern of gastric cancer. The risk of local lymph node invasion increases with the tumor invasion depth of gastric wall. Standard lymph node dissection is an important step to improve the prognosis of patients with gastric cancer. At present, D 2 radical gastrectomy is the standard procedure for locally advanced gastric cancer. Therefore, it is of great significance to popularize the standardization of lymph node dissection in radical gastrectomy on the basis of 4K laparoscopic platform, which can improve the treatment level of gastric cancer surgeons and provide "homogenized" diagnosis and treatment services for patients.

In recent years, minimally invasive surgery represented by laparoscopic technology has been carried out and gradually become a trend in the treatment of gastric cancer. The building of an excellent team is an important guarantee for the successful operation. As a high-imaging technology, 4K laparoscopy effectively improves the surgical field of vision and contri-butes to the development of laparoscopic surgery. Therefore, paying high attention to the building of a laparoscopic surgery team and comprehensive improvement of the team′s execution are conducive to the timely and effective application of various new technologies including 4K laparoscopy in the minimally invasive surgery for radical gastrectomy.

Surgery is the basis of the treatment for rectal cancer, especially for low rectal cancer. How to maintain a good quality of life and keep physiological function for patients after surgery while pursuing a long-term survival has been an important issue. In recent years, function preservation operation for low rectal cancer has continuously developed because of the deep understanding of the pathology and molecular pathology of rectal cancer, optimization and development of multidisciplinary diagnosis and treatment, introduction of total mesorectal excision and pelvic autonomic nerve preservation, and the continuous innovation of medical equipment and surgical operation. The development of rectal cancer surgery will undoubtedly be more manifested in functional preservation and protection. For low rectal cancer patients, achieving maximum function preservation under the premise of radical resection relies on the precise treatment based on evidence-based medicine and the individualized anus preserving operation.