ID3 and testicular germ cell tumor: We further analyzed ID3 expression among these groups and observed a positive association between ID3 expression and the enrichment scores of the HR-related gene ontologies in patients of prostate adenocarcinoma (PRAD) (Figure 6A-C), testicular germ cell tumors (TGCT) (Figure 6D–F) and kidney renal papillary cell carcinoma (KIRP) (Supplementary Figure S6B–D).