A woman’s endometrial thickness of 15mm is not necessarily cancerous. A woman’s thick endometrial lining is related to the high level of estrogen in the body, which makes the endometrial lining grow excessively and easily leads to increased menstrual flow. To diagnose women suffering from endometrial cancer, it is not only necessary to observe the thickness of the endometrium, but mainly based on the results of endometrial pathology tests. If it is endometriosis, the diagnostic scraping pathology results are only the endometrial thickening and value-added phase changes, and it is necessary to give scraping or to give progesterone-based drugs for counteracting the treatment, so that the endometrium becomes thinner on it. If the endometrium is 15mm thick, scraping diagnosis for the endometrium appears to have tumor cells, it suggests that the endometrium is malignant, when a woman has endometrial thickening in menopause, must pay enough attention to prevent endometrial malignant changes. If the ultrasound suggests that the endometrium is thickened, timely endometrial scraping and pathologic examination.