Type of Preparation: Conventional Magnification: High Interpretation: Adenocarcinoma, endocervical Cytomorphologic Criteria: Cluster of cells with large round or oval nuclei, irregular chromatin and prominent nucleoli. Cytoplasm is poorly defined and finely vacuolated. Bloody smear background. Explanatory Notes: Prominent or macronucleoli and tumor diathesis are classic findings in invasive adenocarcinoma of the endocervix.