CSNK1G2 and testicular germ cell tumor: The correlation analysis between the methylation levels of CSNK1G2-AS1 and the prognosis of TGCT patients showed that patients with hypermethylation of CSNK1G2-AS1 had significantly lower DFS (Fig. 2B) and PFS (Fig. 2C) than patients with hypomethylation.