ArticleGastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association2025
Impact of histologically poorly cohesive phenotype as a prognostic factor in patients with pStage II/III gastric cancer undergoing adjuvant chemotherapy.
Article in Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundFew studies have focussed on using histological phenotype to evaluate prognostic factors after adjuvant chemotherapy (AC) in patients with pStage II/III gastric cancer. We evaluated the impact of histological type based on the World Health Organization classification.
methodsOverall, 348 patients with pStage II/III advanced gastric cancer undergoing R0 gastrectomy without neoadjuvant chemotherapy were included. Of these, 143 underwent AC. Univariate and multivariate analyses for prognostic factors of relapse-free survival (RFS) and overall survival (OS) were performed in all patients and patients receiving AC. Moreover, long-term survivals were compared by histological phenotype between patients with and without AC.
resultsMultivariate analysis in all patients revealed that histologically poorly cohesive carcinoma with not otherwise specified and signet ring cell subtype (PCC-NOS/SRC) and pN 2/3 independently and adversely affected RFS. Alternatively, male sex, poor PS and pN 2/3 adversely affected OS. In multivariate analysis of patients receiving AC, longer tumour size (≥ 80 mm), histologically PCC-NOS/SRC phenotype and pN 3 independently influenced RFS. Multivariate analysis in this population for OS revealed that pN 3 and poor postoperative immune-nutritional status significantly induced worse OS. Comparison of RFS and OS by histological phenotype between patients with and without AC showed that AC had no efficacy for improving long-term survivals in histologically PCC phenotype.
conclusionsHistologically PCC phenotype by WHO classification, particularly PCC-NOS/SRC phenotypes, showed poor long-term RFS even after AC in patients with pStage II and III gastric cancer. An effective chemotherapeutic regimen needs to be developed for this specific subtype of gastric cancer.
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