An adenocarcinoma characterized by the presence of cells resembling the glandular cells of the ENDOMETRIUM. It is a common histological type of ovarian CARCINOMA and ENDOMETRIAL CARCINOMA. There is a high frequency of co-occurrence of this form of adenocarcinoma in both tissues.

Synonyms: Adenocarcinoma, Endometrioid, Endometrioid Carcinomas, Carcinomas, Endometrioid, Endometrioid Adenocarcinoma, Endometrioid Carcinoma, Carcinoma, Endometrioid, Adenocarcinomas, Endometrioid, Endometrioid Adenocarcinomas