CD274 and neoplasm: After subdividing the tumor group by the primary organs, the TMB value of GC showed the most significant correlation with PD-L1 CPS (Pearson correlation coefficient = 0.513, p < 0.001; Figure 2C) and PD-L1 TPS (Pearson correlation coefficient = 0.625, p < 0.001; Figure 2C,D).