In addition, the expression of FDX1 in tumors was lower than that in adjacent tumor samples from TCGA (KIRC), International Cancer Genome Consortium (ICGC) (RECA-EU), Gene Expression Omnibus (GEO) (GSE66272), and ArrayExpress (E-MTAB-3267) databases (Figure 1B, 1D–1F). This evidence concerns the gene FDX1 and neoplasm.