Endometrial Intraepithelial Neoplasia Nomenclature

There are currently two systems of endometrial pre-cancer nomenclature in common use, the WHO 1994 scheme and the endometrial intraepithelial neoplasia designation. This older scheme is the one most commonly used by pathologists but ACOG recommends transitioning to the endometrian intraepithelium neoplasia nomenclatures because it would provide greater benefit to clinical management. In the EIN scheme, there's actually three disease categories in this EIN scheme. The first is for benign tissue changes, like benign endometrial hyperplasia. The second is pre-malignant changes, called endometrioid type that's well differentiated. And the