P4HA2 and bladder transitional cell carcinoma: P4HA2 was found to be a risk factor for OS, DSS, DFI, and PFI in BRCA, a risk factor for OS, DSS, and PFI in BLCA, CESC, GBM, HNSC, KICH, KIRP, LGG, and UVM, but a protective factor for OS, DSS, DFI, and PFI in DLBC (Figure 14A).