endometrial endometrioid adenocarcinoma (MONDO_0006192) is a primary endometrial adenocarcinoma composed of neoplastic cells that form complex glandular patterns associated with budding and branching of the neoplastic glands. The neoplastic glands resemble those of the normal endometrium and may or may not be associated with sheet-like proliferation of malignant cells. Endometrioid adenocarcinoma is the most commonly seen morphologic variant of endometrial adenocarcinoma. Also known as: endometrioid adenocarcinoma of endometrium, endometrioid adenocarcinoma of the endometrium, endometrioid carcinoma of endometrium, endometrioid carcinoma of the endometrium, endometrioid endomet. adenocar., endometrioid endometrial adenocarcinoma, uterine corpus endometrioid adenocarcinoma, uterine corpus endometrioid carcinoma.