In the clinical setting, when endometrial cancer is suspected, further pathological examination is required. Generally, endometrial tissue can be obtained through fractional curettage or hysteroscopic endometrial biopsy. The acquired endometrium is then subject to a pathological examination, observing the morphology of the endometrial cells under a microscope. If cancer cells are detected, a diagnosis of endometrial cancer can be made. Therefore, the confirmation of endometrial cancer in clinical practice must be based on pathological examination.