Cases Of Advanced Gastric Cancer Research Articles

P9-4 Experiences with trastuzumab deruxtecan in 11 cases of advanced gastric cancer

P9-4 Experiences with trastuzumab deruxtecan in 11 cases of advanced gastric cancer

Efficacy and safety analysis of first-line tirelizumab combined with paclitaxel-containing chemotherapy regimen in 30 cases of real-world advanced gastric cancer in China.

e14643 Background: According to the latest global cancer statistics, gastric cancer is the 6th most common tumor with the highest incidence rate and the 5th highest mortality rate in the world. The primary treatment for advanced gastric cancer is still based on chemotherapy, and the median overall survival (OS) of patients treated with conventional chemotherapy is only 12 months. Recently, the rapid rise of immunotherapy has also brought new hope to gastric cancer patients. Many trials related to chemotherapy combined with immunotherapy for advanced gastric cancer are currently underway, which has been a hot research topic in recent years and has had auspicious positive results, such as the KEYNOTE-059 and CHECKMATE649 study. To reduce the burden of disease, the accessibility of innovative drugs has been significantly improved, providing more new clinical treatment ideas and options for Chinese patients with advanced gastric cancer. Methods: The study enrolled advanced gastric cancer (HER-2 negative) was treated with immune combination paclitaxel for first-line treatment, as follows: receiving intravenous albumin-conjugated paclitaxel (260 mg/m2) every 3 weeks; in combination with Tirelizumab (200 mg every three weeks), and after 4-6 cycles of treatment, Tirelizumab was maintained until disease progression or intolerance. The primary study endpoints were progression-free survival (PFS) and overall survival (OS), and the secondary endpoints were objective remission rate (ORR) and safety. Results: From July 2020 to August 2023, 30 patients received first-line immunization and paclitaxel-containing chemotherapy regimens at our center. The objective remission rate (ORR) was 40.9%, and the disease control rate (DCR) was 77.3%. The incidence of treatment-related grade 1-2 adverse reactions was: vomiting in 5 cases (16.7%), loss of appetite in 22 cases (73.3%), diarrhea in 10 cases (33.3%), transaminase elevation in 5 cases (16.7%), numbness of the hands and feet in 25 cases (83.3%), leukopenia in 7 cases (23.3%), and hemoglobin reduction in 16 cases (53.3%). hyperbilirubinemia in 2 cases (6.7%). Grade 3-4 adverse events and their incidence were: vomiting in 4 cases (13.3%), loss of appetite in 4 cases (13.3%), diarrhea in 1 case (3.3%), transaminase elevation in 2 cases (6.7%), leukopenia in 3 cases (10.0%), and hemoglobin reduction in 2 cases (6.7%). There were 3 cases of immunosuppressant-related adverse reactions (1 case of immunosuppressant-associated thyroiditis, 1 case of immunosuppressant-associated acute myocardial infarction, Conclusions: The first-line treatment of advanced gastric cancer with immune checkpoint inhibitors combined with paclitaxel-containing chemotherapy has a high rate of disease control, prolongs overall survival, has more clinical adverse reactions, is favored by grade 1-2 adverse reactions, and has a high degree of safety, and provides a new clinical idea for the first-line treatment of patients with advanced gastric cancer. Clinical trial information: KY2022-189-02.

Aldehyde Dehydrogenese-1 High Cancer Stem-like Cells/Cancer-initiating Cells Escape from Cytotoxic T Lymphocytes due to Lower Expression of Human Leukocyte Antigen Class 1.

Human gastric cancer stem-like cells (CSCs)/cancer-initiating cells can be identified as aldehyde dehydrogenase-high (ALDHhigh) cells. Cancer immunotherapy employing immune checkpoint blockade has been approved for advanced gastric cancer cases. However, the effectiveness of cancer immunotherapy against gastric CSCs/CICs remains unclear. This study aimed to investigate the susceptibility of gastric CSCs/CICs to immunotherapy. Gastric CSCs/CICs were isolated as ALDHhigh cells using the human gastric cancer cell line, MKN-45. ALDHhigh clone cells and ALDHlow clone cells were isolated using the ALDEFLUOR assay. ALDH1A1 expression was assessed via qRT-PCR. Sphere-forming ability was evaluated to confirm the presence of CSCs/CICs. A model neoantigen, AP2S1, was over-expressed in ALDHhigh clone cells and ALDHlow clone cells, and susceptibility to AP2S1-specific TCR-T cells was assessed using IFNγ ELISPOT assay. Three ALDHhigh clone cells were isolated from MKN-45 cells. ALDHhigh clone cells exhibited a stable phenotype in in vitro culture for more than 2 months. The High-36 clone cells demonstrated the highest sphere-forming ability, whereas the Low-8 cells showed the lowest sphere-forming ability. High-36 cells exhibited lower expression of HLA-A24 compared to Low-8 cells. TCR-T cells specific for AP2S1 showed lower reactivity to High-36 cells compared to Low-8 cells. High-36 cells and Low-8 cells represent novel gastric CSCs/CICs and non-CSCs/CICs, respectively. ALDHhigh CSCs/CICs evade T cells due to lower expression of HLA class 1.

A case of treatment-resistant advanced gastric cancer with FGFR2 gene alteration successfully treated with pemigatinib.

Comprehensive genome profiling (CGP) is expected to widen the scope of cancer drug options by identifying the genes involved in carcinogenesis. However, a few patients can access recommended treatments following CGP. Herein, we report a case in which pemigatinib, a selective fibroblast growth factor receptor (FGFR) inhibitor, was used as last-line therapy to treat a patient with advanced gastric cancer exhibiting FGFR2 genomic alterations, as determined by CGP testing. The patient (male, 52years old) was diagnosed with advanced gastric cancer (cStage IV, cT4aN3M1 [LYM], por, HER2 0, microsatellite stable) and received docetaxel + cisplatin + S-1 (7 cycles), irinotecan + ramucirumab (11 cycles), and nivolumab (3 cycles), but experienced progressive disease (PD). Subsequently, FoundationOne Liquid CDx testing was conducted, revealing FGFR2 rearrangement and amplification; however, no clinical trials on genotype-matched therapies for FGFR2 alterations were available. After three cycles of TAS-102, the patient experienced PD and provided consent for the off-label use of pemigatinib. The Cancer Genomics Medical Committee of our hospital approved the self-funded treatment. The patient had markedly decreased CEA and CA19-9 levels after treatment initiation, but experienced PD after five courses. Over the treatment course, grade 1 hyperphosphatemia and onychomadesis were observed. To the best of our knowledge, this is the first reported case of pemigatinib therapy employed in a patient with advanced gastric cancer exhibiting FGFR2 gene alterations. This case could serve as a notable example of tumor-agnostic therapy to broaden treatment options for gastric cancer patients with rare genetic alterations.

Oxyntic Gland Neoplasms - From Adenoma to Advanced Gastric Cancer: A Review of 29 Cases.

Oxyntic gland neoplasm (OGN) is a rare condition that can be classified as oxyntic gland adenoma (OGA) or gastric adenocarcinoma of fundic-gland type (GA-FG). GA-FG primarily presents as early gastric cancer, with only a few reported cases of advanced gastric cancer (AGC). We aimed to investigate the clinicopathological features of OGN and describe an aggressive variant. We investigated a total of 29 cases, including a patient with double primary cases, diagnosed with OGN or differentiated-type adenocarcinoma with GA-FG morphology, between November 2016 and April 2022. We analyzed 54 pathological specimens and reviewed their clinicopathological, endoscopic, and histological features. The lesions were reclassified as OGA or GA-FG, and immunohistochemical (IHC) staining for MUC-5AC and MUC-6 was performed on available resected GA-FG cases. The median patient age was 65 years and males accounted for 58.6% of patients. Most cases occurred in the body horizontally (69.0%) and on the greater curvature side cross-sectionally (48.3%). Endoscopically, type 0-IIa (41.4%) and a subepithelial tumor-like appearance (24.1%) were the most common findings. Histologically, there were 8 cases of OGA (27.6%) and 21 cases of GA-FG (72.4%). In GA-FG, MUC-6 was positive in 13 cases (81.3%), whereas MUC-5AC was positive in 8 cases (50.0%). Three cases presented as AGCs. Although OGNs are generally considered low-grade, they can present as AGCs and may exhibit features of lymphovascular or perineural invasion. Recognizing the clinicopathological features and accurately diagnosing OGN are important for providing adequate treatment.

Ex-situ Open Approach Spleen Preserving Splenic Hilum Lymphadenectomy.

Background: multiple studies showed important benefices arising from splenic preservation in patients with digestive cancer in general and gastric cancer in particular. The minimally invasive approach remains controversial in locally advanced gastric cancer cases whilst the open approach still has an important role. This paper's aim is to describe and present the feasibility of an open surgical technique that allows removing stations 10 together with 11p and 11d with spleen and splenic vessels preservation in pacients operated upon by open surgery. Material and Methods: We present an open "Ex-situ" spleen and pancreas preserving surgical technique that removes the anterior and posterior ganglia from the splenic hilum, the splenic vessels and the distal pancreas in locally advanced gastric cancer cases of the upper two thirds of the stomach. Forty-three consecutive patients since 2003 were operated upon by the author in multiple centers. during upper two thirds gastric cancer resections requiring no. 10 lymphadenectomy. Results: no splenectomy was needed . All the spleens were viable at postoperative Doppler echography and CT scans. No spleen migrated nor caused mechanical complications. No clinically significant pancreatic leaks were noticed. Two patients died during hospital stay, one of miocardial infarction and one of massive stroke. Pertinent follow up data and survival were not available. Conclusions: The method enables the surgeon to remove the lymph nodes no. 10 along with 11p and 11d without needing to sacrifice the spleen. All spleens were reattached sucessfully using the preserved spleno-renal ligament fold, no wandering spleen was noticed.

Differential Diagnosis of Thickened Gastric Wall between Hypertrophic Gastritis and Borrmann Type 4 Advanced Gastric Cancer.

: Accurately diagnosing diffuse gastric wall thickening is challenging. Hypertrophic gastritis (HG), while benign, mimics the morphology of Borrmann type 4 advanced gastric cancer (AGC B-4). We compared the features of endoscopy and endoscopic ultrasonography (EUS) between them. : We retrospectively reviewed patients who underwent EUS for gastric wall thickening between 2000 and 2021, selecting HG and pathologically confirmed advanced gastric cancer cases. Ulceration and antral wall thickening were determined via endoscopy, while EUS assessed the 5-layered gastric wall structure, measuring the proper muscle (PM) layer and total wall thickness. : Male dominance was observed in AGC B-4, and the hemoglobin and albumin levels were significantly lower. The rate of antral wall thickening and presence of ulceration were significantly higher in AGC B-4 cases. Destruction of the PM layers was observed only in AGC B-4 cases, and the PM was significantly thicker in AGC B-4 cases. Forceps biopsy had an excellent success rate in ulcer-present AGC B-4 cases, but only a 42.6% success rate was observed for cases without ulcers, necessitating additional diagnostic modalities. A PM thickness of 2.39 mm distinguished between AGC B-4 and HG effectively. The multivariable analysis showed that a thickened PM layer and the presence of ulceration were significant risk factors for the diagnosis of AGC B-4. : Endoscopic findings of a thickened gastric wall, including antral involvement, and presence of ulcer were significant risk factors for the diagnosis of AGC B-4. EUS findings of destroyed wall layers and a thickened PM of >2.39 mm were the key points of differentiation between HG and AGC B-4.

Analysis of bacterial diversity and community structure in gastric juice of patients with advanced gastric cancer

BackgroundThe occurrence and development of gastric cancer are related to microorganisms, which can be used as potential biomarkers of gastric cancer.ObjectiveTo screen the microbiological markers of gastric cancer from the microorganisms of gastric juice.MethodsGastric juice samples were collected from 61 healthy people and 78 patients with gastric cancer (48 cases of early gastric cancer and 30 cases of advanced gastric cancer). The bacterial 16 S rRNA V1-V4 region of gastric juice samples was sequenced. The Shannon index, Simpson index, Ace index and Chao index were used to analyze the diversity of gastric juice samples. The RDP classifier Bayesian algorithm was used to analyze the community structure of 97% OTU representative sequences with similar levels. Linear discriminant analysis and ST-test were used to analyze the differences. Six machine learning algorithms, including the logistic regression algorithm, random forest algorithm, neural network algorithm, support vector machine algorithm, Catboost algorithm and gradient lifting tree algorithm, were used to construct risk prediction models for gastric cancer and advanced gastric cancer.ResultsThe microbiota diversity and the abundance of bacteria was different in the healthy group, early gastric cancer and advanced gastric cancer (P < 0.05). The top five abundant bacteria among the three groups were Streptococcus, Rhodococcus, Prevotella, Pseudomonas and Helicobacter. Bacterial flora such as Streptococcus, Rhodococcus and Ochrobactrum were significantly different between the healthy group and the gastric cancer group. The accuracy of the random forest prediction model is the highest (82.73% correct). The bacteria with the highest predictive value included Streptococcus, Lactobacillus and Ochrobactrum. The abundance of bacteria such as Fusobacterium, Capnocytophaga, Atopobium, Corynebacterium was high in the advanced gastric cancer group.ConclusionGastric juice bacteria can be used as potential biomarkers to predict the occurrence and development of gastric cancer.

A Case of Advanced Gastric Cancer in which Pathologically Complete Response to Nivolumab was Confirmed by Radical Operation

A Case of Advanced Gastric Cancer in which Pathologically Complete Response to Nivolumab was Confirmed by Radical Operation

A Case of Advanced Gastric Cancer in which Pancreaticoduodenectomy was Successfully Avoided by the Use of Nivolumab Combination Chemotherapy

A Case of Advanced Gastric Cancer in which Pancreaticoduodenectomy was Successfully Avoided by the Use of Nivolumab Combination Chemotherapy

The Impact of Nutritional Support on Survival Outcomes in Patients with Advanced Gastric Adenocarcinoma Treated with Chemotherapy

Malnutrition and cachexia occur commonly in patients with advanced gastric cancer (AGC). This study elucidated the effect of nutritional support (NS) on survival outcomes among patients with AGC undergoing chemotherapy. We retrospectively evaluated new AGC cases at our institute between January 2015 and January 2021. Inclusion criteria were unresectable or recurrent chemotherapy-treated gastric adenocarcinoma, ECOG performance status (PS) 0–2, and adequate organ function. Time to treatment failure (TTF) and overall survival (OS) were evaluated, and univariate and multivariate analyses identified prognostic factors. A total of 103 eligible patients were separated into groups: 69 patients (67%) into NS and 34 (33%) into routine care (RC). The median follow-up time was 11.0 mo, (0.5–92). NS was offered to patients with poorer PS (p = 0.03), Glasgow prognostic score (GPS) positivity (p = 0.001), and high neutrophil-to-lymphocyte ratios (cut-off ≤ 3, p = 0.02). Median OS and TTF in the RC and NS groups were 11.6 and 10.4 mo, (p = 0.99) and 4.2 and 5.5 mo, (p = 0.07), respectively. Multivariate analyses identified NS (hazard ratio [HR] = 0.53, p = 0.01) and GPS positivity for TTF, and low body mass index (HR = 2.03, p = 0.007) and GPS positivity (HR = 2.25, p = 0.001) for OS as significant prognostic factors. Thus, NS with chemotherapy is a potentially effective intervention for AGC.

Cisplatin-Capecitabine vs Oxaliplatin-Capecitabine: Comparison of Outcomes in Advanced Gastric Carcinoma Patients

Introduction: Chemotherapy is the primary therapeutic choice for advanced gastric cancer. Different types of medicine combinations are can be used for chemotherapy treatment, but oxaliplatin is one of the more common ones, used to treat metastasized cancer. But recently, cisplatin has shown similar outcome, while costing less for the patients and the hospital. The goal of this study was to assess the effectiveness of cisplatin-capecitabine versus oxaliplatin-capecitabine in treating advanced gastric cancer by measuring disease response and toxicity levels. Methods: This Quasi-Experimental study was conducted at the Department of Oncology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh. The study duration was 1 year, from February 2021 to March 2022. During this period, a total of 64 cases of advanced gastric cancer were divided in two equal groups, Arm A who had received cisplatin capecitabine, and Arm B who received oxaliplatin capecitabine. Result: In Arm A, 18 (56.3%) patients exhibited partial response (PR), whereas 15 (46.9%) patients in Arm B showed PR. Stable diseases (SD) were also reported in both arms (18.8% in arm A and 21.9% in arm B). There were 8 (25.0%) cases of progressive disease (PD) in Arm A and 10 (31.3%) cases in Arm B. The most prevalent toxicities in both arms were vomiting, diarrhea, anemia, neutropenia, oral mucositis, paresthesia, hand-foot syndrome, and renal toxicity. There were no statistically significant variations in outcomes between the two arms (p-value &gt; 0.05). Conclusion: In advanced gastric cancer, the Cisplatin-Capecitabine regimen is equally effective as Oxaliplatin-Capecitabine, and there was no significant difference between the presenting toxic effects. As the Cisplatin-Capecitabine regimen is less costly than the combination of Oxaliplatin-Capecitabine, and shows similar outcomes in terms of response and toxicity, it is a valid alternative choice of medicine for patients who are unable to afford an .........

Clinicopathological Characteristics of Advanced Epstein-Barr Virus-associated Gastric Cancer Highlighting Aberrant p53 Expression.

Epstein-Barr virus (EBV)-associated gastric cancer is a distinct subtype of stomach adenocarcinoma. Although previous studies have investigated its clinicopathological characteristics, there is a lack of research focusing on advanced EBV-associated gastric cancer. In this study, we performed a comprehensive review of advanced EBV-associated gastric cancer cases. We retrospectively collected 18 consecutive cases of surgically resected advanced EBV-associated gastric cancer. Clinicopathological parameters were investigated using histological review, immunohistochemistry, and a review of the electronic medical records of the hospital. The predominant histological pattern of advanced EBV-associated gastric cancer, according to the Laurén classification, was intestinal-type adenocarcinoma with varying degrees of differentiation. However, focal areas showing conventional gastric carcinoma with a lymphoid stromal pattern were found in all cases except one. In addition to the previously described histological patterns of EBV-associated gastric cancer, one case displayed chronic granulomatous inflammation-like histology with barely identifiable malignant epithelial cells. Another case had a pure signet-ring cell carcinoma component showing nuclear positivity for the EBV-encoded RNA in situ hybridization assay. Remarkably, five out of 18 cases (27.8%) showed aberrant p53 expression on immunostaining, which is known to occur rarely in EBV-associated gastric cancer. All cases with aberrant p53 expression had intestinal-type adenocarcinoma-like components. Advanced EBV-associated gastric cancer had distinct histology and a higher rate of aberrant p53 immunostaining pattern than conventional EBV-associated gastric cancer. Therefore, their biological behavior should be investigated separately.

P41-5 A case of advanced gastric cancer treated successfully with nivolumab

ATTRACTION-2 trial showed that nivolumab significantly prolonged overall survival compared with Best Supportive Care, with a median overall survival of 5.26 months. We report a case of gastric cancer with peritoneal dissemination that has achieved long-term survival of 2 years or more after administration of nivolumab.

Early Adoption of Checkpoint Inhibitors in Patients with Metastatic Gastric Adenocarcinoma-A Case Series of Non-Operative Long-Term Survivors.

Checkpoint inhibitor (CPI) therapy has only recently been introduced in the first-line treatment of advanced gastric cancer. However, later line monotherapy CPI efficacy in a subset of patients was presented about four years prior. Here, we present three cases of advanced gastric adenocarcinoma cancers treated with CPI in early lines years prior to the availability of randomized first line data. All three patients remain in remission without gastrectomy, with the median time from initial diagnosis of approximately 52 months. With long-term follow-up of more than four years, we present a proof of concept that, with early integration of CPI therapy, highly durable responses are possible even in the absence of surgery in patients with advanced gastric and gastroesophageal junction cancers.

Predictive biomarkers for the efficacy of nivolumab as\u2009\u2265\u20093rd-line therapy in patients with advanced gastric cancer: a subset analysis of ATTRACTION-2 phase III trial

PurposeThe phase 3 ATTRACTION-2 study demonstrated that nivolumab monotherapy improved survival compared to placebo in patients with pretreated advanced gastric cancer (AGC). However, the efficacy of nivolumab seems to be limited to a subset of patients.Materials and methodsThe predictive values of blood neutrophil–lymphocyte ratio (NLR), serum Na, PD-L1 expression, MSI status, tumor EBV infection, and tumor mutation burden (TMB) were investigated in patients with AGC refractory to ≥2 lines of chemotherapy enrolled from Asan Medical Center in ATTRACTION-2 study.ResultsAll 45 patients were analyzed; nivolumab (n = 28) and placebo (n = 17) groups. The objective response rate, median progression-free survival (PFS), and overall survival (OS) were 16.7%, 1.6 months, and 8.1 months in nivolumab group and 0%, 1.6 months and 6.5 months in placebo group. When comparing nivolumab with the placebo group, tumor PD-L1 expression, blood NLR, and serum Na were significant predictive factors of PFS and OS. A multivariate analysis revealed that PD-L1 ( +) and low NLR (≤ 2.9, median) were associated with better PFS. In the nivolumab group, PD-L1 ( +), low NLR, and normal Na (≥ 135 mmol/L) were associated with higher response and disease control rates, while tumor EBV infection and TMB were not.ConclusionTumor PD-L1 expression, blood NLR, and serum Na could be predictive biomarkers for the efficacy of nivolumab in previously treated cases of AGC.

Hepatic resection using intraoperative ultrasound and near-infrared imaging with indocyanine green fluorescence detects hepatic metastases from gastric cancer: A case report.

Introduction and importanceNear-infrared (NIR) imaging with indocyanine green (ICG) is a sensitive intraoperative tool for detecting liver tumors. NIR imaging has been used to distinguish metastatic liver cancer from colon cancer; however, its utility for identifying metastatic lesions from gastric cancer remains unknown. We present a case of advanced gastric cancer with multiple liver metastases, which was diagnosed and treated using intraoperative NIR imaging with ICG.Case presentationA 69-year-old man with advanced gastric cancer and simultaneous multiple liver metastases presented with gastric bleeding. He underwent gastrectomy and chemotherapy, which reduced the tumor burden. No new lesions were noted, and the patient was advised to undergo surgical resection of the residual liver metastases. Prior to surgery, 0.5 mg/kg of intravenous ICG was administered. NIR imaging was performed during hepatectomy, which revealed clear green fluorescence in several liver segments, indicating liver metastases. Two lesions were not identified during preoperative magnetic resonance imaging. All fluorescent areas were resected. The tumors identified by both preoperative and fluoresced intraoperatively demonstrated malignant features on histopathological examination. The two lesions that fluoresced intraoperatively but were not identified on preoperative images demonstrated normal liver parenchyma and no signs of malignancy. The patient remains tumor-free 1 year after surgery.Clinical discussionThis report demonstrates that hepatic metastases from gastric cancer can be diagnosed with intraoperative NIR imaging with ICG.ConclusionsNIR imaging with ICG can detect liver metastases but may provide false positive results. As the percentage of false positives is high, additional resections must be decided upon carefully.

Advanced gastric cancer detected during regular follow-up after eradication of Helicobacter pylori.

Helicobacter pylori (H. pylori) is an important risk factor for gastric cancer and is a recognized carcinogen. Although eradication of H. pylori reduces the incidence of gastric cancer, cases can still occur after eradication therapy. A number of such cases have been reported, and their early clinicopathological characteristics are becoming clearer. Some reports mention that endoscopic diagnosis of gastric cancer may be difficult after eradication therapy, because the cancer is covered by non-cancerous epithelium. However, there are few reports on advanced gastric cancer after eradication therapy, and its characteristics remain poorly understood. In view of the predicted increase in frequency of advanced gastric cancer after eradication therapy in the near future, it is important to be aware of these cases. In this report, we describe three cases of advanced gastric cancer detected during routine follow-up after eradication.

Seventeen-year Survival of a Case of Advanced Gastric Cancer with Krukenberg Tumor Treated by Oophorectomies, Subsequent Gastrectomy, and Chemotherapy

Seventeen-year Survival of a Case of Advanced Gastric Cancer with Krukenberg Tumor Treated by Oophorectomies, Subsequent Gastrectomy, and Chemotherapy

A Case of Advanced Gastric Cancer That Was Difficult to Treat During Chemotherapy for Advanced Lung Cancer

A Case of Advanced Gastric Cancer That Was Difficult to Treat During Chemotherapy for Advanced Lung Cancer