SALL4 expression in mixed ovarian germ cell tumors (90.44±44.53, mean±SD), yolk sac tumors (64.45±37.55, mean±SD), dysgerminomas (43.56±25.14, mean±SD) and immature teratomas (24.79±23.80, mean±SD) was significantly higher than normal ovarian tissues (P<0.0001, P<0.0001, P<0.0001, P = 0.02, respectively) (Figure 1D). The gene discussed is SALL4; the disease is teratoma.