HAS2 was significantly positively correlated with MSI in two types of tumors, namely SARC and testicular germ cell tumors (TGCT); and significantly negatively correlated with MSI in 10 types of tumors, namely GBMLGG, LUAD, COAD, COADREAD, STES, KIPAN, PRAD, HNSC, LUSC, DLBC. The gene discussed is HAS2; the disease is testicular germ cell tumor.