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Cancer of the endometrium, a common cancer in women, is a disease in which cancerous cells develop in the endometrial lining of the uterus.
There are several types of endometrial cancer, but most occur in the glandular cells of the endometrium and are called adenocarcinomas. Cancer of the endometrium is different from cancer of the muscle of the uterus (sarcoma of the uterus).
In the United States, endometrial cancer is the most common type of cancer of the female reproductive organs. The American Cancer Society estimated that 36,000 new cases would be diagnosed in the United States in the year 2000, and that 6,500 women would die of the disease the same year. Most cases (95 percent) of endometrial cancer occur in women who are over the age of 40.