IFITM3 and bladder transitional cell carcinoma: In addition, the current BLCA cohort was classified into low- and high-expression groups based on the median level of IFITM3 expression (IRS ≤ 2 vs. IRS > 3), and we found that the infiltrating level of CD8+ T cells and PD-L1 expression were higher in the high-IFITM3 group (Figures 6H–J).