H19 and intraepithelial neoplasia: We screened the differentially expressed lncRNAs between every two groups in chronic non-atrophic gastritis tissues, gastric mucosal low-grade/high-grade intraepithelial neoplasia tissues, and GC tissues using edgeR, and identified lncRNAs H19, LINC00895, lnc-SRGAP2C-16, lnc-B3GALT2-1, lnc-HLA-C-2, and lnc-APOC1-1 as research focus.