Electronic poster abstractsendometrial cancer invading the superficial myometrium of the uterus.The patient underwent hysterectomy and bilateral tubal and ovaries and recovered well after surgery.In this case, the main manifestation of endometrial cancer was pelvic mass, and there were no typical clinical symptoms such as postmenopausal vaginal bleeding or vaginal fluid.The uterus showed an expansive growth because the tumour blocked the inner opening of the cervix, resulting in fluid cannot be discharged.This case suggests that endometrial cancer may not be overlooked in the differential diagnosis when pelvic cystic-solid mass is the dominant manifestation, especially in postmenopausal women.