The mucous membrane that covers the uterine cavity is called the endometrium and is affected by sex hormones after puberty to undergo cyclic changes and produce menstruation. Cancer of the endometrium is called endometrial cancer, also known as uterine corpus cancer, which is mostly adenocarcinoma. It is one of the three common malignant tumors of female reproductive tract, with a high incidence age of 58-61 years old, accounting for about 7% of the total number of female cancers and 20-30% of the malignant tumors of female reproductive tract. Very early endometrial cancer has no obvious symptoms and is only discovered accidentally during census or examination for other reasons. Once symptoms appear, they are mostly manifested as vaginal bleeding, mainly postmenopausal vaginal bleeding, the amount of which is usually not much, and it is rare to see massive bleeding, or continuous or intermittent bleeding, while non-menopausal patients complain of increased menstrual flow, prolonged menstrual period or intermenstrual bleeding; vaginal discharge, a few patients complain of increased discharge, which is mostly plasma or plasma blood in early stage. Pain, only in the advanced stage, the cancer infiltrates the surrounding tissues or compresses the nerves, causing pain in the lower abdomen and lumbosacral area, and radiates to the lower limbs and feet. Systemic symptoms, such as anemia, emaciation, cachexia, fever and systemic failure will appear in advanced stage. Early gynecological examination has no obvious abnormalities. Generally speaking, the typical symptoms of endometrial cancer are vaginal bleeding after menopause or menstrual disorders in perimenopausal women, which should be treated as benign diseases after excluding endometrial cancer.