TNF and gastric cancer: To explore the immunological characterization of this feature, we performed Gene set variation analysis (GSVA) functional enrichment analysis using RNA sequencing data of gastric cancer samples (6 samples were high‐risk and 6 samples were low‐risk), and found that immune‐related pathways in the low‐risk feature included overall upregulation of interferon (IFN) and upregulation of the TNFα pathway (Figure 6C).