Type of Preparation: SurePath/ LBP Magnification: High Clinical History: 35 year old Interpretation: HSIL Cytomorphologic Criteria: When examining hyperchromatic crowded groups, it is important to study the cells at the edges. In this case, nuclear enlargement and chromatin abnormalities consistent with CIS are evident. Explanatory Notes: This type of cellular arrangement suggests glandular extension. Follow-up: Biopsy- CIN 3 (severe dysplasia with endocervical gland involvement)