Adenocarcinoma Of Esophagogastric Junction Research Articles

Immune checkpoint inhibitor treatment in PD-L1-negative gastroesophageal cancer tumors.

e16062 Background: We aimed to investigate whether there is a subgroup of patients with gastroesophageal cancers who, despite having IHC-PD-L1 negative tumors, might still benefit from ICI treatment. Furthermore, the impact of ICI treatment on patients with tumors that are PD-L1 negative by IHC but exhibit high CD274 (PD-L1) expression remains undefined. Methods: 1,416 esophageal adenocarcinomas (EA), 486 esophageal squamous carcinomas (ES), 859 esophagogastric junction adenocarcinomas (EJA), and 1,613 gastric adenocarcinoma (GA) samples were analyzed using NGS of DNA (NextSeq, 592 genes and NovaSeq, WES) and RNA (NovaSeq, WTS) (Caris Life Sciences, Phx, AZ). PD-L1 IHC positivity was defined as > 1% CPS (Agilent's 22c3). Correlation between PD-L1 CPS and CD274 expression (transcripts per million – TPM) were assessed by Spearman’s coefficient. Tumors were divided into CD274-H (high expression) and CD274-L (low expression) cohorts, representing the top 25% and bottom 25% of expression levels, respectively. Real-world overall survival (OS) data were obtained from insurance claims records and analyzed using Cox proportional hazards with hazard ratios (HR) and log-rank tests. Results: Weak correlations were observed between PD-L1 CPS and CD274 expression in adenocarcinoma histology tumors (EA: 0.374, EJA: 0.358, GA: 0.387), while a stronger correlation was found in squamous tumors (ES: 0.537). Median CD274 expression was significantly higher in PD-L1+ compared to PD-L1- ES tumors (2.65-fold) and in EA (1.68-fold), EJA (1.92-fold), and GA (1.96-fold) tumors (p < 0.001). In PD-L1 IHC-negative ES, there was no association between CD274-H expression and OS (H 12.4 vs L 10.6 mo; HR 0.90, p = 0.48). However, in adenocarcinomas, CD274-H showed a slightly improved OS (12.8 vs 11.3 mo; HR 0.79, p < 0.05). CD274-H trended towards worse post-Carboplatin/paclitaxel (CP) OS (ES: 13.8 vs 18.2 mo; HR 1.60; p = 0.22; Adenocarcinoma: 18.2 vs 27.4 mo; HR 1.50, p = 0.19). Interestingly, CD274-H was associated with improved post-CP/nivolumab survival in ES (96.5 vs 28 mo; HR 0.32; p = 0.047), with a similar but not statistically significant pattern in Adenocarcinoma EGC (Not Reached vs 30.2 mo; HR 0.39, p = 0.23). Furthermore, in CD274-L GEC, there was no difference in post-treatment survival with the addition of Nivolumab to CP (Squamous: 30 vs 18.2 mo; HR 0.91, p = 0.83; Adenocarcinoma: 30.2 vs 27.4 mo; HR 1.14; p = 0.76). In contrast, CD274-H showed improved survival with the addition of Nivolumab (Squamous: 96.5 mo vs 13.8 mo; HR 0.15; p = 0.01; Adenocarcinoma: NR vs 18.2 mo; HR 0.30; p = 0.08). Conclusions: High CD274 expression was associated with improved survival when Nivolumab was added to chemotherapy in patients with PD-L1-negative tumors. Further investigation is needed to confirm the potential benefits of Nivolumab treatment in gastroesophageal cancer patients with tumors that are PD-L1-negative by IHC but exhibit high mRNA expression.

Neoadjuvant serplulimab in combination with concurrent chemoradiotherapy for locally advanced, resectable esophagogastric junction adenocarcinoma.

e16103 Background: Surgery combined with perioperative therapy was recommended as standard treatment for patients with locally advanced esophagogastric junction (EGJ) adenocarcinoma, but the survival rate was still poor. Immunotherapy has shown antitumor activity and an acceptable safety profile in advanced EGJ cancer. The aim of this study was to evaluate the efficacy and safety of neoadjuvant Serplulimab combined with concurrent chemoradiotherapy in previously untreated locally advanced resectable EGJ adenocarcinoma. Methods: Eligible patients with resectable EGJ(Siewert Type II and Type III, Siewert classification 2000)adenocarcinoma stage cT3-4 or N+ were enrolled. Patients received neoadjuvant Serplulimab (300mg on day 1) plus SOX(oxaliplatin at 130mg/㎡on day 1; TS1 40-60mg two times per day on D1-D14, Q3W) in first cycle, followed by Serplulimab (300mg on day 1) combined with concurrent chemoradiotherapy (Reduced SOX regimen: oxaliplatin at 100mg/㎡on day 1, TS1 40-60mg two times per day on D1-D14, Q3W; Radiotherapy dose:45Gy in 25f) in second and third cycle. The patient finished the preoperative treatment and rested for 6-8 weeks for surgery. The primary endpoint was pathological complete response (pCR) rate. Secondary endpoints were major pathological response(MPR) rate, R0 resection rate, objective response rate(ORR), disease-free survival(DFS), overall survival(OS), and toxicity. Results: From March 8, 2023 to January 31,2024,15 patients were enrolled. Nine patients completed neoadjuvant therapy. Eight of these patients underwent radical surgical resection. One out of nine achieved a confirmed pathological complete response (pCR) after three cycles of neoadjuvant treatment. Additionally, two out of nine patients achieved major pathological response(MPR). So, the pCR rate was 11.1%, and the MPR rate was 22.2%. The Tumor and Lymph Nodes downstaging rates are 62.5% and 87.5%, respectively. The median DFS and OS were not reached. In terms of safety, fifteen patients who received at least one cycle of neoadjuvant therapy were included. The most common treatment-related adverse events(TRAE) across all grades were nausea/vomiting(6/15), anorexia(5/15), thrombocytopenia(4/15), and fatigue(4/15). Four patients (26.7%) had grade≥3 adverse events during preoperative therapy, with thrombocytopenia(3/15) and hepatic veno-occlusive disease(1/15). Immune-related adverse reactions(irAE) included myositis(1/15) and rash(1/15), both were grade 1. No grade 4 or higher TRAEs were observed. Conclusions: Initial benefits were demonstrated when using Serplulimab with concurrent chemoradiotherapy for the treatment of locally advanced, resectable EGJ adenocarcinoma patients. The efficacy and safety of Serplulimab with chemoradiotherapy will be further investigated in this trial later. Clinical trial information: NCT05918419 .

Impact of immune checkpoint inhibitors on survival outcomes in advanced gastric cancer in Japan: A real-world analysis.

Nivolumab was approved for the treatment of advanced gastric cancer in 2017 in Japan. The aim of this study was to assess the impact of nivolumab in a real-world clinical setting. This single-institutional retrospective study included patients with advanced gastric or esophagogastric junction adenocarcinoma and a history of first-line chemotherapy with platinum-based doublet or triplet regimens between 2010 and 2020. To assess the impact of nivolumab on survival, the patients were divided based on the year of nivolumab approval into a pre-2017 (2010-2016) group and a post-2017 (2017-2020) group. From a total of 1918 patients, 1093 were excluded. There were 533 patients in the pre-2017 group and 292 in the post-2017 group. Immune checkpoint inhibitors were used significantly more often in the post-2017 group than in the pre-2017 group (8.6% vs. 47.9%). Median overall survival was significantly longer in the post-2017 group (16.9 vs. 13.9 months; hazard ratio [HR] 0.75, 95% confidence interval [CI] 0.63-0.90; p < 0.01). The proportion of patients transitioning to third-line treatment was higher in the post-2017 group than in the pre-2017 group (56.3% vs. 43.8%, p < 0.01). Median survival outcomes following progression on second-line treatment were significantly longer in the post-2017 group (4.3 vs. 3.2 months; HR 0.70, 95% CI 0.57-0.86; p < 0.01). The proportion of patients transitioning to third-line treatment and survival outcomes following progression on second-line treatment have improved since the approval of nivolumab. This drug might help to prolong overall survival in real-world practice.

473P Perioperative safety and oncologic feasibility of proximal gastrectomy in Siewert II/III locally advanced adenocarcinoma of esophagogastric junction: An inverse propensity-weighted study

473P Perioperative safety and oncologic feasibility of proximal gastrectomy in Siewert II/III locally advanced adenocarcinoma of esophagogastric junction: An inverse propensity-weighted study

467P Novel staging schemes for Siewert type II esophagogastric junction adenocarcinoma: A real-world data cohort study from SEER database

467P Novel staging schemes for Siewert type II esophagogastric junction adenocarcinoma: A real-world data cohort study from SEER database

Risk factors and clinical significance of lower perigastric lymph node metastases in Siewert type II and III esophagogastric junction adenocarcinoma: a retrospective cohort study

BackgroundNo consensus has been concluded with regarding to the scope of lymph node (LN) dissection for Siewert type II and III adenocarcinoma of the esophagogastric junction (AEG). This study aimed to explore risk factors for lower perigastric LN (LPLN) metastases (including no. 4d, 5, 6, and 12a LN stations) and analyze the indications for LPLN dissection.MethodsIn total, 302 consecutive patients with Siewert type II and III AEG who underwent total gastrectomy (TG) were enrolled. The logistic regression model was used to perform uni- and multivariate analyses of risk factors for LPLN metastases. Kaplan–Meier curves were used for survival analysis, and log-rank tests were used for group comparisons. Basing on the guidelines of Japanese Gastric Cancer Association, the LN metastases (LNM) as well as the efficiency index (EI) of each LN station was further evaluated.ResultsThe independent risk factors for LPLN metastases in patients with Siewert type II and III AEG were distance from the esophagogastric junction (EGJ) to the distal end of the tumor (> 4.0 cm), preoperative carcinoembryonic antigen (CEA) ( +), pT4 stage, and HER-2 ( +). LPLN metastases was an independent risk factor for overall survival following TG. The LNM and EI of LPLN were 8.6% and 2.31%, respectively. The LNM of LPLN > 10% under the stratification of the distance from the EGJ to the distal end of the tumor (> 4.0 cm), pT4, preoperative CEA ( +), and HER-2 ( +) exhibited EI values of 3.55%, 2.09%, 2.51%, and 3.64%, respectively.ConclusionsLPLN metastases was a malignant factor for the prognosis of patients with Siewert type II and III AEG. For patients with preoperative CEA ( +), pT4 stage, HER-2 ( +), and the distance from the EGJ to the distal end of the tumor (> 4.0 cm), TG with LPLN dissection is prioritized for clinical recommendation.

Histopathologic response in patients with curative resection with D2 dissection following neoadjuvant treatment for locally advanced gastric and esophagogastric junction adenocarcinoma

AimThis study evaluated pathologic response rate, overall survival (OS), and postoperative complications in locally advanced gastric cancer (GC) and esophagogastric junction (EGJ) adenocarcinoma patients who underwent curative gastric resection D2 lymph node dissection with neoadjuvant treatment. MethodsWe reviewed the medical records of 122 patients with locally advanced GC and EGJ adenocarcinoma who had neoadjuvant treatment and curative resection with D2 dissection between January 2014 and December 2022. Patients were divided into responders and nonresponders. Grades 1a-1b were responders, while 2–3 were non-responders. Patients' clinicopathological features, pathologic response rate, survival, and postoperative complications were evaluated. We assessed complications using the Clavien-Dindo (CD) classification. Total survival was assessed using the Kaplan-Meier model. Overall survival was assessed using univariate and multivariate Cox regression analysis. ResultsThe mean age of the study participants was 61 (N = 89 males; N = 33 females). There were 79 GC and 43 EGJ adenocarcinomas. Overall postoperative complications (CD ≥ II) were 27 %. Postoperative complications were similar in responders and non-responders (p = 0.316). YpT0N0 had a 2.5 % pathological complete response rate. Responders had better overall survival, but there was no statistical difference. ConclusionsBoth responder and non-responder groups have similar postoperative complications. A complete pathologic response is discouraging for assessing neoadjuvant chemotherapy for locally advanced gastric cancer, but a positive treatment response is acceptable. Pathologic response rate helps stage and predict gastric cancer prognosis. Responder groups survive slightly better.

Value of exhaled hydrogen sulfide in early diagnosis of esophagogastric junction adenocarcinoma.

Esophagogastric junction adenocarcinoma (EJA) has increased in recent years, and it exhibits a poor prognosis and a short survival period for patients. Hydrogen sulfide (H2S) plays an important role in the pathogenesis of cancer and has been studied as a diagnostic factor in some tumor diseases. However, few studies have explored the diagnostic value of H2S for EJA. In the present study, a total of 56 patients with early-stage EJA were enrolled while 57 healthy individuals were selected as the healthy control group. Clinical features were recorded, and exhaled H2S and blood samples were collected from both groups. Exhaled H2S and serum interleukin-8 (IL-8) expression levels were detected in both groups. The correlation between exhaled H2S and serum IL-8 levels was analyzed using Pearson's correlation method. Receiver operating characteristic (ROC) curve was used to evaluate the diagnostic value of exhaled H2S combined with IL-8 detection in EJA. The results showed that patients with EJA exhaled more H2S than healthy individuals. In addition, exhaled H2S was positively correlated with increased IL-8 expression. The ROC curve revealed that the exhaled H2S test had an acceptable diagnostic effect and could be used to diagnose EJA. The increase in H2S exhaled by patients with EJA indicated that H2S may be related to the occurrence and development of EJA; however, the in vivo mechanism needs to be further explored. Collectively, it was determined in the present study that exhaled H2S was significantly higher in patients with early-stage EJA than in healthy controls and combined diagnosis with patient serum IL-8 could improve diagnostic accuracy, which has potential diagnostic value for early diagnosis and screening of EJA.

1759: CROSS Vs FLOT in distal or esophageal gastric junction adenocarcinoma. Mono-institutional experience

1759: CROSS Vs FLOT in distal or esophageal gastric junction adenocarcinoma. Mono-institutional experience

Anti–Helicobacter pylori Treatment in Patients With Gastric Cancer After Radical Gastrectomy

Whether anti-Helicobacter pylori treatment can provide survival benefits for patients with gastric cancer who are diagnosed with H pylori infection is an area with limited research. To explore the potential survival benefits of anti-H pylori treatment after radical gastrectomy in patients with gastric cancer and presurgical confirmation of H pylori infection. This retrospective cohort study was conducted using data from patients with gastric cancer treated between January 1, 2010, and December 31, 2018, and followed up for outcome ascertainment until May 19, 2021. Propensity score matching was performed in patients treated with or without anti-H pylori treatment. This study involved a single institute in a comprehensive cancer treatment and research center located in Guangzhou, Guangdong Province, China. The study included patients with gastric or esophagogastric junction adenocarcinoma who underwent curative gastrectomy with D2 lymphadenectomy and tested positive for H pylori infection. Data were analyzed from March to June 2023. Anti-H pylori treatment, which primarily includes triple therapy regimens consisting of amoxicillin, clarithromycin, and omeprazole for 14 days. Clinical outcomes, including overall survival (OS) and disease-free survival (DFS), were analyzed by Kaplan-Meier method, log-rank test, and Cox proportional hazards regression model. Subgroup analysis based on crucial clinical information was also conducted. All 1293 patients (median [IQR] age, 59 [50-65] years; 860 [66.5%] male) were divided into 2 groups, with 125 patients in the anti-H pylori treatment group and 1168 patients in the non-anti-H pylori treatment group based on whether they received anti-H pylori treatment during the perioperative period and the follow-up. Survival analysis showed that the 5-year OS rates were 94.1% (95% CI, 89.3%-99.2%) in the anti-H pylori group and 73.8% (95% CI, 70.7%-77.0%) in the non-anti-H pylori group, and the hazard ratio (HR) of these 2 groups was 0.33 (95% CI, 0.18-0.60; P < .001). The survival benefit remained after propensity score matching (HR, 0.50; 95% CI, 0.26-0.99; P = .048). Multivariable analysis for OS and DFS further showed the survival benefit of anti-H pylori treatment, with HRs of 0.38 (95% CI, 0.17-0.87; P = .02) and 0.48 (95% CI, 0.28-0.83; P = .008), respectively. Among patients with TNM stage II/III disease who received adjuvant chemotherapy, anti-H pylori treatment was associated with survival benefits (OS: HR, 0.49; 95% CI, 0.24-0.99; P = .046), whereas among those who did not receive adjuvant chemotherapy, anti-H pylori treatment was not associated with survival benefits (OS: HR, 0.29; 95% CI, 0.04-2.08; P = .22). This cohort study indicates that anti-H pylori treatment may be associated with improved survival in patients with gastric cancer who have H pylori infections. The study reinforces the importance of including H pylori screening and treatment in the surgical treatment of these patients.

High LINC00626 expression promotes esophagogastric junction adenocarcinoma metastasis: the mediating role of the JAK1/STAT3/KHSRP axis

To investigate the role of JAK1/STAT3/KHSRP axis in mediating the regulatory effect of LINC00626 on progression of esophagogastric junction adenocarcinoma. We collected surgical tumor and adjacent tissue specimens from 64 patients with esophagogastric junction adenocarcinoma and examined the expression levels of LINC00626 and KHSRP. qRT-PCR was used to detect the expressions of LINC00626 and KHSRP in 6 esophageal adenocarcinoma cell lines (OE-19, TE-7, Bic-1, Flo-1, SK-GT-4, and BE-3) and a normal esophageal epithelial cell line (HET-1A). OE-19 and TE-7 cell lines with stable LINC00626 knockdown and FLO-1 and SK-GT-4 cells stably overexpressing LINC00626 were constructed by lentiviral transfection, and the changes in proliferation, migration and invasion of the cells were evaluated using Cell Counting Kit-8 (CCK-8) assay and Transwell migration/invasion assay. The expressions of KHSRP and JAK/STAT pathway proteins in the transfected cells were detected with Western blotting. The effects of LINC006266 knockdown and overexpression on subcutaneous tumor formation and lung metastasis of OE-19 and FLO-1 cell xenografts were tested in nude mice. The expression levels of LINC00626 and KHSRP were significantly increased in esophagogastric junction adenocarcinoma tissues and in esophageal adenocarcinoma cells. LINC00626 knockdown obviously inhibited the proliferation, migration and invasion of esophageal adenocarcinoma cells in vitro and decreased their tumor formation and lung metastasis abilities in nude mice, while overexpression of LINC00626 produced the opposite effects. In esophageal adenocarcinoma cells, LINC0626 knockdown significantly decreased and LINC00626 overexpression strongly enhanced the phosphorylation of JAK1 and STAT3. High LINC00626 expression promotes esophageal-gastric junction adenocarcinoma metastasis by activating the JAK1/STAT3/KHSRP signal axis.

Preoperative ultrasound-guided dual localization with titanium clips and carbon nanoparticles for predicting the surgical approach and guiding the resection of Siewert type II esophagogastric junction adenocarcinoma

ObjectiveTo investigate the superiority of preoperative ultrasound-guided titanium clip and nanocarbon dual localization over traditional methods for determining the surgical approach and guiding resection of Siewert type II adenocarcinoma of the esophagogastric junction (AEG).MethodThis study included 66 patients with Siewert type II AEG who were treated at the PLA Joint Logistics Support Force 900th Hospital between September 1, 2021, and September 1, 2023. They were randomly divided into an experimental group (n = 33), in which resection was guided by the dual localization technique, and the routine group (n = 33), in which the localization technique was not used. Surgical approach predictions, proximal esophageal resection lengths, pathological features, and the occurrence of complications were compared between the groups.ResultThe use of the dual localization technique resulted in higher accuracy in predicting the surgical approach (96.8% vs. 75.9%, P = 0.02) and shorter proximal esophageal resection lengths (2.39 ± 0.28 cm vs. 2.86 ± 0.39 cm, P < 0.001) in the experimental group as compared to the routine group, while there was no significant difference in the incidence of postoperative complications (22.59% vs. 24.14%, P = 0.88).ConclusionPreoperative dual localization with titanium clips and carbon nanoparticles is significantly superior to traditional methods and can reliably delineate the actual infiltration boundaries of Siewert type II AEG, guide the surgical approach, and avoid excessive esophageal resection.

O220: The role of cardiopulmonary exercise testing in predicting sarcopenia after neoadjuvant chemotherapy and post-operative complications

Abstract Background Neoadjuvant chemotherapy (NAC) may contribute to sarcopenia development in patients with oesophageal and oesophagogastric junction (OGJ) adenocarcinoma. Preoperative cardiopulmonary fitness and sarcopenia are both variables which have been correlated with outcomes after major surgery. The aims of this study were to investigate if pre-operative cardiopulmonary exercise testing (CPET) variables were associated with radiological sarcopenia post NAC, and the effect of CPET variables on post-operative outcomes in sarcopenic patients. Methods Patients from a single high-volume tertiary centre diagnosed with oesophageal or OGJ adenocarcinoma between August 2015 and August 2022 were included. CPET variables and post-NAC CT scans to assess for radiological sarcopenia were evaluated. CPET variables included in statistical analyses were ventilatory equivalent for carbon dioxide (VE/VCO2), anaerobic threshold (AT) and peak oxygen consumption (VO2 peak). Results 208 patients were included. Median VE/VCO2 was 29 in patients with sarcopenia post-NAC and 28 in non-sarcopenic patients (p = 0.009). Other CPET variables were not associated with sarcopenia post NAC. Within the sarcopenic group, CPET variables were not associated with post-operative complications. Within the whole cohort, increased VE/VCO2 or decreased VO2 peak correlated with a longer hospital stay (p=0.043 and p=0.012 respectively), and an association was observed between VE/VCO2 and Clavien-Dindo grade of complications (p=0.019). Conclusions VE/VCO2 was associated with sarcopenia post NAC in patients with oesophageal and OGJ adenocarcinoma. Further analysis with a larger sample size might help establish this, which could be helpful in identifying and targeting patients at higher risk of sarcopenia and post-operative complications.

Preoperative docetaxel, cisplatin, and 5-fluorouracil for resectable locally advanced esophageal and esophagogastric junctional adenocarcinoma

BackgroundChemotherapy consisting of 5-fluorouracil, leucovorin, oxaliplatin, and docetaxel is the standard perioperative treatment for resectable esophageal adenocarcinoma and esophagogastric junctional adenocarcinoma (EGJ-AC) in Western countries. Meanwhile, preoperative chemotherapy consisting of docetaxel, cisplatin, and 5-fluorouracil (DCF) has been developed for esophageal squamous cell carcinoma in Japan. However, there are few reports on the safety and efficacy of preoperative DCF for resectable EGJ-AC in the Japanese population.MethodsPatients with histologically confirmed resectable EGJ-AC who received preoperative DCF (docetaxel 70 mg/m2 and cisplatin 70 mg/m2 on day 1 and continuous infusion of 5-fluorouracil 750 mg/m2/day on days 1–5 every 3 weeks with a maximum of three cycles) between January 2015 and April 2020 were retrospectively evaluated. We assessed the rates of completion of ≥ 2 courses of DCF and R0 resection, histopathological response, progression-free survival (PFS), overall survival (OS), and adverse events.ResultsThirty-two patients were included. Median follow-up was 28.7 (range, 5.2–70.8) months and median age was 63 (range, 42–80) years. Twenty-one patients (66%) had a performance status of 0. The proportions of clinical stage IIA/IIB/III/IVA/IVB disease were 3%/0%/44%/44%/9%, respectively. The treatment completion rate was 84%. A histopathological response of grade 1a/1b/2/3 was obtained in 58%/26%/13%/3% of cases. Median PFS was 40.7 months (95% confidence interval 11.8-NA). Median OS was not reached (80.8% at 3 years). Grade ≥ 3 adverse events were observed in 63% of cases (neutropenia, 44%; febrile neutropenia, 13%). No treatment-related deaths occurred.ConclusionsPreoperative DCF for resectable EGJ-AC was well tolerated and has promising efficacy.

Assessment of risk factors of lymph node metastasis and prognosis of Siewert II/III adenocarcinoma of esophagogastric junction: A retrospective study.

Adenocarcinoma of the esophagogastric junction (AEG) has a high incidence, and the extent of lymph node dissection (LND) and its impact on prognosis remain controversial. This study aimed to explore the risk factors for lymph node metastasis (LNM) and prognosis in Siewert II/III AEG patients. A retrospective review of 239 Siewert II/III AEG patients surgically treated at Beijing Friendship Hospital from July 2013 to December 2022 was conducted. Preoperative staging was conducted via endoscopy, ultrasound gastroscopy, CT, and biopsy. Depending on the stage, patients received radical gastrectomy with LND and chemotherapy. Clinicopathological data were collected, and survival was monitored semiannually until November 2023. Utilizing logistic regression for data analysis and Cox regression for survival studies, multivariate analysis identified infiltration depth (OR = 0.038, 95% CI: 0.011-0.139, P < .001), tumor deposit (OR = 0.101, 95% CI: 0.011-0.904, P = .040), and intravascular cancer embolus (OR = 0.234, 95% CI: 0.108-0.507, P < .001) as independent predictors of LNM. Lymph nodes No. 1, 2, 3, 4, 7, 10, and 11 were more prone to metastasis in the abdominal cavity. Notably, Siewert III AEG patients showed a higher metastatic rate in nodes No. 5 and No. 6 compared to Siewert II. Mediastinal LNM was predominantly found in nodes No. 110 and No. 111 for Siewert II AEG, with rates of 5.45% and 3.64%, respectively. A 3-year survival analysis underscored LNM as a significant prognostic factor (P = .001). Siewert II AEG patients should undergo removal of both celiac and mediastinal lymph nodes, specifically nodes No. 1, 2, 3, 4, 7, 10, 11, 110, and 111. Dissection of nodes No. 5 and No. 6 is not indicated for these patients. In contrast, Siewert III AEG patients do not require mediastinal LND, but pyloric lymphadenectomy for nodes No. 5 and No. 6 is essential. The presence of LNM is associated with poorer long-term prognosis. Perioperative chemotherapy may offer a survival advantage for AEG patients.

Chinese expert consensus on the surgical treatment for adenocarcinoma of esophagogastric junction (Edition 2024)

The publication of Chinese expert consensus on the surgical treatment for adenocarcinoma of esophagogastric junction (2018 edition) has widely accelerated the standardization and homogenization on the surgical treatment of adenocarcinoma of esophagogastric junction (AEG). In China, the surgical outcomes of AEG, the universality and practicability of this consensus has also been affirmed after the clinical practice during the past 5 years. Due to the persistent increasing incidence of AEG, the specificity on anatomic site, clinicopathological characteristics, molecular biological characteristics, AEG had been always the hotspot of many clinical trials and more clinical evidences had been published. However, its definition, classification, staging, surgical approach, resection pattern, extent of lymphadenectomy, and the digestive tract reconstruction etc. remain controversial. In light of the above, it is necessary to update the 2018 edition of consensus. The Chinese expert consensus on the surgical treatment for adenocarcinoma of esophagogastric junction (2024 edition) is generated based on the currently available and best clinical evidence, the latest global guidelines or consensuses, and the opinions from the Chinese expert panel. The present consensus focuses on the key points of surgical treatment and issues in dispute, and provides scientific recommendations. The goal of this expert consensus was to improve the homogeneity in understanding and practice between Chinese thoracic and gastrointestinal surgeons, and to further standardize surgical treatment of AEG. Those pending issues in this consensus need high-quality clinical research to further investigate.

Tumor stroma ratio, tumor stroma maturity, tumor-infiltrating immune cells in relation to prognosis, and neoadjuvant therapy response in esophagogastric junction adenocarcinoma.

Accurate predictions on prognosis and neoadjuvant therapy response are crucial for esophagogastric junction adenocarcinoma (EGJA) patients. Therefore, we aimed to investigate the predictive abilities of several indicators, including tumor stroma ratio (TSR), tumor stroma maturity (TSM), and the density and spatial distribution of tumor-infiltrating immune cells (TIICs), such as T cells, B cells, and tumor-associated macrophages (TAMs). Resection and biopsy specimens of a total of 695 patients were included, obtained from the National Cancer Center (NCC) and The Cancer Genome Atlas (TCGA) cohorts. TSR and TSM were evaluated based on histological assessment. TIICs were quantified by QuPath following immunohistochemical (IHC) staining in resection specimens, while the Klintrup-Mäkinen (KM) grade was employed for evaluating TIIC in biopsy specimens. Patients with high stromal levels or immature stroma had relatively worse prognoses. Furthermore, high CD8+T cell count in the tumor periphery, as well as low CD68+ TAM count either in the tumor center or in the tumor periphery, was an independent favorable prognostic factor. Significantly, the combination model incorporating TSM and CD163+TAMs emerged as an independent prognostic factor in both two independent cohorts (HR 3.644, 95% CI 1.341-9.900, p = 0.011 and HR 1.891, 95% CI 1.195-2.99, p = 0.006, respectively). Additionally, high stromal levels in preoperative biopsies correlated with poor neoadjuvant therapy response (p < 0.05). In conclusion, our findings suggest that TSR, TSM, CD8+T cell, CD68+TAMs, and CD163+TAMs predict the prognosis to some extent in patients with EGJA. Notably, the combined model incorporating TSM and CD163+TAM can contribute significantly to prognostic stratification. Additionally, high stromal levels evaluated in preoperative biopsy specimens correlated with poor neoadjuvant therapy response.

Prognostic nutritional index in predicting survival of patients with gastric or gastroesophageal junction adenocarcinoma: A systematic review.

Gastric cancer is the third most common cause of cancer related death worldwide. Surgery with or without chemotherapy is the most common approach with curative intent; however, the prognosis is poor as mortality rates remain high. Several indexes have been proposed in the past few years in order to estimate the survival of patients undergoing gastrectomy. The preoperative nutritional status of gastric cancer patients has recently gained attention as a factor that could affect the postoperative course and various indexes have been developed. The aim of this systematic review was to assess the role of the prognostic nutritional index (PNI) in predicting the survival of patients with gastric or gastroesophageal adenocarcinoma who underwent gastrectomy with curative intent. To investigate the role of PNI in predicting the survival of patients with gastric or gastroesophageal junction adenocarcinoma. A thorough literature search of PubMed and the Cochrane library was performed for studies comparing the overall survival (OS) of patients with gastric or gastroesophageal cancer after surgical resection depending on the preoperative PNI value. The PRISMA algorithm was used in the screening process and finally 16 studies were included in this systematic review. The review protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO). Sixteen studies involving 14551 patients with gastric or esophagogastric junction adenocarcinoma undergoing open or laparoscopic or robotic gastrectomy with or without adjuvant chemotherapy were included in this systematic review. The patients were divided into high- and low-PNI groups according to cut-off values that were set according to previous reports or by using receiver operating characteristic curve analysis in each individual study. The 5-year OS of patients in the low-PNI groups ranged between 39% and 70.6%, while in the high-PNI groups, it ranged between 54.9% and 95.8%. In most of the included studies, patients with high preoperative PNI showed statistically significant better OS than the low PNI groups. In multivariate analyses, low PNI was repeatedly recognised as an independent prognostic factor for poor survival. According to the present study, low preoperative PNI seems to be an indicator of poor OS of patients undergoing gastrectomy for gastric or gastroesophageal cancer.

Comparison of postoperative survival between early-onset and late-onset adenocarcinoma of esophagogastric junction: a population-based study.

The prognosis of early-onset adenocarcinoma of esophagogastric junction (AEG) remains unclear. This research aimed at comparing the prognosis between early-onset and late-onset AEGs. We extracted eligible patients with surgically resected, pathologically confirmed, nonmetastatic AEG from the Surveillance, Epidemiology, and End Results database from 2004 to 2015. The cutoff age of early-onset AEG was set at ≤50years old. Univariate and multivariate Cox analysis as well as competing risk model were adopted for comparing overall survival (OS) and cancer-specific survival (CSS) between early-onset and late-onset AEGs. In addition, multiple imputation and propensity score matching (PSM) were also carried out for sensitivity analysis. In total, 4610 eligible AEG patients were collected in this study, including 610 early-onset AEGs and 4000 late-onset AEGs. Kaplan-Meier curves revealed significantly better survival in early-onset AEGs than late-onset AEGs. After interpolating missing data by multiple imputation, multivariate Cox regression analysis similarly showed better OS and CSS in early-onset AEGs. By using PSM analysis at a ratio of 1:1, we matched 610 early-onset AEG patients with 610 late-onset AEG patients. After PSM, univariate Cox regression model still revealed favorable prognosis in early-onset AEGs. Similar results were confirmed by performing PSM analysis at a ratio of 1:2 and 1:3. In addition, competing risk model demonstrated significantly lower cancer-specific death in early-onset AEGs compared to late-onset AEGs before and after matching. By applying several effective sensitivity analyses, we reported significantly favorable OS and CSS in early-onset AEGs compared to late-onset AEGs.

Comparative study on the expression of Pax3, Rad51 and VEGF-C in esophageal gastric junction adenocarcinoma and distal gastric adenocarcinoma.

The purpose of this study was to explore the differential expression of Pax3, Rad51 and VEGF-C in esophageal gastric junction adenocarcinoma and distal gastric adenocarcinoma and their relationship with cancer occurrence and development. 57 patients with gastric cancer were included and divided into esophageal gastric junction adenocarcinoma group (n=28) and distal gastric adenocarcinoma group (n=29). The positive expressions of Pax3, Rad51 and VEGF-C in the control group were lower than those in the esophageal gastric junction adenocarcinoma group and distal gastric adenocarcinoma group respectively (P<0.05). In esophageal gastric junction adenocarcinoma with low differentiation, positive expressions of Pax3, Rad51, and VEGF-C surpassed those in high/medium differentiation (P<0.05). Serosa-infiltrated cases exhibited higher Pax3 and Rad51 expressions compared to non-infiltrated cases (P<0.05). Rad51 and VEGF-C positivity were notably elevated in cases with lymph node metastasis compared to those without (P<0.05). Distal gastric adenocarcinoma displayed higher VEGF expression than middle/low differentiated adenocarcinomas. Rad51 expression was significantly higher in women than in men (P<0.05). The positive rates of Pax3, Rad51, and VEGF-C were markedly increased in esophageal gastric junction adenocarcinoma and distal gastric adenocarcinoma compared to normal gastric tissue, and these were associated with the degree of differentiation, depth of invasion, and lymph node metastasis in patients. Particularly, Rad51 exhibited a positive correlation with cancer cell differentiation, invasion depth, and lymph node metastasis in cancer tissue.