Endometrial cancer, also called uterine cancer, is the abnormal growth of cells in the lining of the uterus (endometrium). The cause of endometrial cancer is not known, but exposure over many years to the hormone estrogen without enough of the hormone progestin to balance it (unopposed estrogen) is linked with type I endometrial cancer.
Long-term unopposed estrogen exposure can be caused by:
Symptoms of endometrial cancer include heavy or unusual vaginal bleeding, especially after menopause but also near the time that menopause begins.
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