The notion that the ability of testicular cancer cells to escape the immune system leading to disease dissemination is linked to reduced PD-L1 expression on TILs is further supported by a notable association between decreased PD-L1 expression in TILs and the presence of high-risk disease as defined by the International Germ Cell Cancer Collaborative Group (IGCCCG) [26]. The gene discussed is CD274; the disease is malignant germ cell tumor.