IFNG and gastric neoplasm: To evaluate whether our findings regarding IFNγ-associated expression of six classical ICPs and three ICPRGs in CRC also applied to distinct tumor types, we compared the overall stacked log2 expression of the six ICP genes and three ICPRGs in the following tumor types: 103 skin cutaneous melanomas (SKCMs); 1,105 breast cancers (BCs); 184 esophageal cancers (ESCs); 416 stomach cancers (STCs); and 501 lung squamous carcinomas (LUSC) all from the TCGA database.