The differential analysis of FDX1 based on cancer and paracancerous tissue samples from the TCGA database indicated that FDX1 had evidently higher expression in paraneoplastic tissues than cancer tissues, such as BRCA, CHOL, COAD, HNSC, KICH, KIRC, KIRP, LIHC, LUAD, LUSC, PCPG, READ, SARC and THCA (Figure 1A). This evidence concerns the gene FDX1 and cancer.