endometrial disorder hyperplasia atypical endometrial hyperplasia UMLS:C0349579 An endometrial hyperplasia characterized by cytologic and architectural changes which may lead to endometrial carcinoma. Despite the atypical features and possible course, there is debate on whether to consider this a neoplasm. The relationship with endometrial intraepithelial neoplasia is also unclear. MONDO:0006096 ICD9:621.33 NCIT:C4654 atypical hyperplasia of endometrium endometrial hyperplasia with atypia EFO:1000098 atypical hyperplasia of the endometrium SCTID:277158007 MEDGEN:138105