Endometrial cancer is the second common gynecologic malignancy in Taiwan. The prevalence has been overcome the epithelial ovarian cancer because of the change of life style to western style recently. Most patients with endometrial cancer are stage I & II, the most histology is still "endometrioid adenocarcinoma" (type I endometrial cancer). In statistics, advanced stage (FIGO stage III and IV) is approximately 16% of all cases.