Type of Preparation: Conventional Magnification: Medium Interpretation: NILM: Reactive cellular changes associated with IUD Cytomorphologic Criteria: Glandular cells in small clusters with increased N/C ratio and cytoplasmic vacuoles. Nuclear degeneration and prominent nucleoli present. Explanatory Notes: The cells may be shed as clusters or singly. Clusters such as these may mimic cells from adenocarcinoma. One should diagnose adenocarcinoma with caution in the presence of an IUD. If in doubt, consider repeat sampling after removal of the IUD. Single cells may also mimic high grade SIL. One needs to look for the morphologic spectrum of abnormalities associated with SIL.