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==Cytologic Features==
* The distinction between and adenoma and lactational change on cytology is extremely difficult (impossible).
* Hypercellar smears
* Loosely cohesive fragments
* Larger cells with prominent nucleoli
* Vacuolated cytoplasm
* Naked nuclei may be present in the background.
* Dirty background with inflammatory cells, macrophages, proteinaceous debris, blood
* May be initially confused with carcinoma.
