C3 and cancer: As shown in the Venn plot presented in Figure 2G, 18 DEmRNAs were found expressed in three cancers simultaneously, including SCARB1, APOC1, CALB1, SLC12A1, BHLHE41, ACSF2, GAS2L3, CD68, C3, HSPB8, UMOD, ALDOB, CGNL1, TIMP1, PKD1L2, NPIPB11, ANK2, and CYP3A5.