WFDC2 and endometrial cancer: The positive expression rate of HE4 in stage I endometrial cancer was higher than that at stage II, the strongly positive expression rate of HE4 at stages III and IV was significantly higher than that at stages I and II, the positive expression rate of HE4 at stages III and IV was higher than that at stage Ia, and the positive expression and strongly positive expression rate of HE4 in advanced endometrial cancer were significantly higher than that at earlier stages.