Mechanism of endometrial polyp: Endometrial polyp is a confined endometrial mass in the uterine cavity formed by endometrial hyperplasia, which may have a tip, the length of which varies, and the longer ones may protrude outside the cervical opening, requiring histopathological examination to confirm the diagnosis. They can occur at any age. The formation of endometrial polyps is directly related to inflammation, endocrine disorders, as well as high local estrogen levels and progesterone insensitivity of the endometrium. The endometrium around the polyp is shed during menstruation, while the polyp is not shed. Polyps may become cancerous under the effect of long-term estrogen.