CD8A and bladder transitional cell carcinoma: A survival analysis revealed that high levels of SH2D1A, PDCD1, TRAC, TRVB28, HLA-DRA, HLA-DMB, CD8A, CD3E, CD3G, and CCR5 were predictive of a good prognosis for BLCA, consistent with the better survival probability for the C2 subtype compared to subtypes.