Abnormalities of glandular cells The Bethesda System 2001: under this expression are grouped morphologic changes of glandular cells, which differ from changes due to inflammatory and reactive conditions. They are: - Atypical glandular cells (AGC), endocervical, endometrial or not otherwise specified (NOS), - Atypical endocervical cells or glandular cells not otherwise specified (NOS), favour neoplastic, - Endocervical adenocarcinoma in situ (AIS), - Adenocarcinoma. See also: Bethesda