A non-neoplastic or neoplastic disorder that affects the endometrium. Representative examples include endometritis, endometrial hyperplasia, and endometrial carcinoma. The disease is Monarch Disease Ontology identifier MONDO_0000931 (endometrial disorder). Also known as: disease of endometrium, disease or disorder of endometrium, disorder of endometrium, endometrium disease, endometrium disease or disorder.