Oncocytic neuroendocrine carcinoma of the pancreas. Report of a case with needle aspiration cytology, immunocytochemistry and electron microscopy.

Needle aspirate of a histologically, immunochemically and ultrastructurally confirmed oncocytic neuroendocrine carcinoma of the pancreas revealed single and loosely clustered polygonal cells with abundant, granular, defined cytoplasm and oval, hyperchromatic nuclei.