Therefore, we used the UALCAN dataset to analyze the methylation levels of the FCGR3A promoter in different tumors and normal tissues, which determined that the methylation levels of the FCGR3A promoter in 12 tumors including BLCA, BRCA, CHOL, COAD, ESCA, HNSC, KIRC, LIHC, lung adenocarcinoma (LUAD), LUSC, PAAD, and PRAD were significantly lower than those in normal tissues (Figures 7A–L). The gene discussed is FCGR3A; the disease is lung adenocarcinoma.