RT-PCR showed that KPNA2 expression in 3 different histological types of OMGCT(including 4 yolk sac tumors, 5 immature teratomas, and 6 mixed ovarian germ cell tumors), was higher than normal ovarian tissues and mature teratomas (Figure 1B). This evidence concerns the gene KPNA2 and ovarian mixed germ cell neoplasm.