An adenocarcinoma that arises from the fallopian tube and resembles the endometrioid adenocarcinoma of the uterus. It usually has a favorable prognosis. The disease is fallopian tube endometrioid adenocarcinoma (Monarch Disease Ontology identifier MONDO_0003666). Also known as: endometrioid adenocarcinoma of fallopian tube, endometrioid adenocarcinoma of the fallopian tube, endometrioid carcinoma of fallopian tube, endometrioid carcinoma of the fallopian tube, fallopian tube endometrioid cancer, fallopian tube endometrioid carcinoma.