Type of Preparation: Conventional Magnification: High Clinical History: 30 year old female, 8 weeks pregnant Interpretation: HSIL Cytomorphologic Criteria: Isolated squamous cells display varying degrees of maturity and dysplastic nuclei. They range from mild to moderate to severe dysplasia warranting a diagnosis of HSIL. Explanatory Notes: It is important to base the diagnosis on the cells showing the most severe abnormality.