DNMT3A and gastric cancer: To confirm these results, we further downloaded sequencing analysis data of GC from GEO which included 69 GC cases (38 were GC tissues and 31 were nonmalignant gastric tissues), results were similar to that of TCGA, but the expression of NDRG1 and DNMT3A showed no statistical significance due to the small sample size (Figs. 2A–2D).