Solid and papillary epithelial neoplasm of the pancreas. Diagnosis by fine needle aspiration cytology in four cases.

The cytologic features of four cases of solid and papillary epithelial neoplasm of the pancreas that were diagnosed on fine needle aspiration cytology are described. Papillary structures with delicate vascular cores covered with several layers of bland tumor cells were a distinctive feature. The papillae in two of the cases showed mucoid material in their cores. The cytologic features of solid and papillary epithelial neoplasm of the pancreas are distinct from those of other cystic pancreatic tumors.