Pancreatic cystic epithelial neoplasms present diagnostic challenges in cytology. An accurate diagnosis is important since the prognosis and treatment may vary. We report the cytologic features in fine needle aspirates of four cases of cystic neoplasms of the pancreas (two micro-cystic adenomas, one mucinous cystic neoplasm and one mucinous cystadenocarcinoma). Smears were evaluated as to their cellularity, content and predominant cell type. Aspirates from the microcystic adenomas yielded hypocellular material with rare strips of cuboidal cells having bland nuclei and pale cytoplasm. No mucinous material was identified in the background, but the cells stained positively with periodic acid-Schiff stain. Smears from the mucinous cystic neoplasm were moderately cellular and contained abundant mucinous material. The columnar epithelial cells were arranged in tight sheets, clusters and strips. Most cells had benign nuclear features with focal mild nuclear atypia. Key cytologic findings n...
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