Type of Preparation: ThinPrep/ LBP Magnification: High Interpretation: HSIL Cytomorphologic Criteria: Numerous dysplastic cells with high nuclear to cytoplasmic ratio, hyperchromasia, and irregular nuclear membranes are consistent with HSIL. Scant cytoplasm is dense and well-defined. Explanatory Notes: Although cytoplasmic features are similar to that seen in squamous metaplasia, nuclear abnormalities are consistent with HSIL.