CCNA2 and cancer: The association of CCNA2 expression with OS, PFI, DFI, and DSS in 33 cancer types in TCGA is shown in Figure 5(a), demonstrating a significant relationship between CCNA2 expression and prognosis in ACC, COAD, KICH, KIRC, KIRP, LGG, LIHC, LUAD, MESO, PAAD, PRAD, SARC, THYM, and UVM.