Endometrial cancer usually manifests in five main aspects. First, irregular vaginal bleeding, which is typically light but can be moderate in some patients. If the patient is postmenopausal, the bleeding often appears as either continuous or intermittent. Second, menstrual disorders, which are a common symptom of endometrial cancer as it is a malignant tumor occurring in the endometrium and significantly affects menstruation. Third, vaginal discharge, where some patients may experience a discharge of thin, white secretions, or a very small amount of bloody discharge in the early stages of the disease. Fourth, pain; once a patient develops endometrial cancer, the tumor may cause bleeding and possibly lead to infection. Fifth, abdominal masses, which can occur if there is a combination of large uterine fibroids or in advanced stages, potentially leading to the formation of large masses in the pelvic cavity due to the spread of a uterine cavity abscess.