ArticleGastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association2025
Classification based on tumor phenotypes enables the novel molecular characterization of esophagogastric junction cancer.
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
backgroundThe incidence of esophagogastric junction (EGJ) cancer is increasing worldwide. Siewert type II EGJ cancer encompasses intestinal and gastric phenotypes; however, the molecular profiles and clinicopathological features remain unclear.
methodsOverall, 922 patients who underwent surgical resection for EGJ or gastric cancer from 2014 to 2023 were analyzed. The tumors were classified into intestinal and gastric phenotypes using immunohistochemistry. Molecular profiling was conducted using whole-exome sequencing, and clinicopathological features, mutational patterns, immune responses, and survival outcomes were investigated.
resultsThe intestinal phenotype exhibited frequent TP53 mutations and high NOX1 expression. High NOX1 expression was correlated with increased CD4 + and CD20 + lymphocyte infiltration. The intestinal phenotype was associated with better relapse-free survival (RFS) than the gastric phenotype. Metastatic patterns varied, with peritoneal and lymph node metastases being more common in the gastric and intestinal phenotypes, respectively. High NOX1 expression was an independent prognostic factor for RFS.
conclusionsEGJ cancers with intestinal and gastric phenotypes demonstrate distinct molecular and immune profiles that influence prognosis. The intestinal phenotype, characterized by TP53 mutations, high NOX1 expression, increased immune cell infiltration, and better survival outcomes, may impact EGJ cancer prognosis and could guide future diagnostic and therapeutic approaches.
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