The lncRNA testis developmental related gene 1 (TDRG1) has been identified as a proto-oncogene for many tumor types, including gastric carcinoma, cervical cancer, epithelial ovarian cancer, endometrial cancer, and testicular germ cell tumors (Ma et al., 2020; Peng et al., 2019). The gene discussed is TDRG1; the disease is testicular germ cell tumor.