POLB and bladder transitional cell carcinoma: Except for CASP9 and POLB, the expression trends of the other three prognostic genes (FASN, VDAC2, and RHOT2) in the BLCA and control groups of the TCGA-BLCA and GSE13507 datasets were consistent, and the intergroup differences were noteworthy (Figures 7C–H).