We analyzed the scRNA-seq profiles of 21 primary gastric cancers (n = 59,594 cells), 20 of which were CDKN2A WT and one were CDKN2A-mutant (Missense Mutation) based on WES [34], to determine if CDKN2A ALT in gastric cancer was significantly associated with decreased inflammation. This evidence concerns the gene CDKN2A and gastric cancer.