Meanwhile, TCGA analyses showed a positive correlation between PD-L1 and HK2 expression in hepatocellular carcinoma (rho = 0.461, p < 0.001), sarcoma (rho = 0.188, p < 0.001), and stomach adenocarcinoma (rho = 0.225, p < 0.001), but not in renal cell carcinoma and urothelial carcinoma (data not shown). Here, HK2 is linked to urothelial carcinoma.