ovarian endometrial cancer (MONDO_0003812) is a benign, borderline, or malignant epithelial tumor of the ovary characterized by the presence of glands and/or cysts lined by neoplastic cells that resemble endometrial cells. Also known as: endometrioid neoplasm of ovary, endometrioid tumor of ovary, endometrioid tumour of ovary, malignant ovarian endometrioid tumor, malignant ovarian endometrioid tumour, ovarian endometrioid neoplasm, ovary endometrioid tumor, ovary endometrioid tumour.