When women experience irregular vaginal bleeding, or vaginal bleeding reoccurs after menopause, and uterine endometrial cancer is suspected, the first step is to conduct a routine gynecological examination to identify whether the bleeding originates from the uterine cavity or the cervix. Additionally, an ultrasound examination can be conducted to observe the condition inside the uterine cavity, the thickness of the endometrium, whether the thickness is uniform, and whether there are any abnormal growths, to understand whether the woman might have uterine endometrial cancer. However, these methods usually cannot provide a diagnosis and only serve to assess or suggest the possibility of endometrial cancer. For a definitive diagnosis, a hysteroscopy or diagnostic curettage can be performed, and the results of the pathological examination can confirm the diagnosis.