Moreover, IHC score of Xiangya BLCA immunotherapy cohort and mRNA expression matrix of IMvigor210 cohort indicated a robust negative correlation between BCAT2 and PD‐L1 (R = −0.4, p = 0.002; R = −0.41, p < 0.001) (Figure S23B,C, Supporting Information). This evidence concerns the gene BCAT2 and bladder transitional cell carcinoma.