Endometrial cancer accounts for 20-30% of malignant tumors of the female reproductive system, and its incidence is increasing year by year. 2. Those who encounter one of the following conditions should undergo endometrial examination immediately. 3. If vaginal bleeding or bloody leucorrhea occurs after menopause, after excluding cervical cancer and vaginitis, they should be highly alert to endometrial cancer and need to undergo curettage or hysteroscopy. 4. Those who are over 40 years old and have irregular vaginal bleeding and cannot stop bleeding despite hormone treatment or recur after once stopping bleeding. 5. Those who have irregular vaginal bleeding and cannot stop bleeding despite hormonal treatment, or recur after once stopping bleeding.5. Those who are younger but have long-term uterine bleeding and sterility.6. Those with persistent vaginal discharge.7. Patients with atypical endometrial hyperplasia and bleeding. 8. Endometrial cancer develops slowly and metastasis is mainly direct invasion, so the treatment effect is better, surgery is quite effective, some of them need to add chemotherapy or radiation therapy.