Type of Preparation: Conventional Magnification: Medium Interpretation: Atypical endocervical cells Cytomorphologic Criteria: Three-dimensional groups of glandular cells with pseudostratification and crowding of cells. Note the presence of cilia in some cells. Explanatory Notes: Tubal metaplasia is a significant pitfall in the interpretation of glandular changes. Cells may show features that overlap with those of AIS and interpretation may be difficult when cilia are not readily appreciated. Follow-up: Tubal metaplasia