In our previous study, to explore the function of lncRNAs in TGCTs, we conducted RNA sequencing and constructed lncRNA expression profiles using 13 TGCT tissues and 4 paraneoplastic tissues 27, and observed that CSNK1G2-AS1 was significantly down-regulated in TGCTs (Fig. 1B). The gene discussed is CSNK1G2; the disease is testicular germ cell tumor.