There is no conclusive evidence that having endometriosis* is associated with risk of endometrial cancer.

Results from studies that have looked at endometriosis and risk of endometrial cancer are not consistent. Some studies have found an increased risk of endometrial cancer in women who have endometriosis, some have found a decreased risk, and some have found no association.

*Endometriosis is a condition in which the lining of the womb (the endometrium) grows outside the womb, causing pain and infertility.