ArticleWorld journal of gastroenterology2025
Clinicopathological significance of histological diversity in gastric adenocarcinoma with primitive enterocyte phenotype: A methylation-driven aggressive entity.
Article in World journal of gastroenterology, 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
backgroundGastric adenocarcinoma with primitive phenotypes has recently attracted increasing attention due to its aggressive nature and challenging diagnosis. Gastric adenocarcinoma with enteroblastic differentiation (GAED) and hepatoid adenocarcinoma (HAC) were previously regarded as gastric adenocarcinoma with primitive enterocyte phenotype (GAPEP). GAPEP is known for its poor prognosis, and the accurate diagnosis of GAPEP directly affects therapeutic decision-making. Despite their poor prognosis and morphological heterogeneity, the molecular drivers of GAPEP, particularly methylation-driven mechanisms, remain poorly explored.
aimTo investigate the clinicopathological and molecular characteristics of GAPEP and establish an integrative diagnostic strategy to guide therapeutic decision-making.
methodsBased on the expression profile and morphology, patients were divided into three groups: GAPEP (including GAED and HAC), conventional gastric cancer (CGC), and CGC expressing primitive phenotypic markers. We analyzed clinicopathological features and overall survival. Data from The Cancer Genome Atlas were also analyzed, and functional enrichment analysis was conducted.
resultsGAPEP showed diverse morphology, and immunohistochemical staining alone was not adequate for accurate diagnosis. Histologically, GAPEP was characterized by large, polygonal tumor cells with supranuclear or subnuclear vacuoles, a "piano keyboard-like" appearance, and clear or eosinophilic cytoplasms. Compared to CGC and CGC expressing primitive phenotypic markers, GAPEP displayed more aggressive clinical features. Molecular analysis showed significant differences in molecular subtypes,
conclusionThe diversity and aggressiveness of GAPEP are driven by deregulated methylation, necessitating the integration of morphological and immunohistochemical diagnosis. Targeting methylation can provide new therapeutic opportunities for treating this aggressive cancer.
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