Aspiration cytology of a rare solid and papillary epithelial neoplasm of the pancreas. Light and electron microscopic study of a case.

The light and electron microscopic appearance of fine needle aspirates from a case of a solid and papillary neoplasm of the pancreas is described. This rare type of tumor, which is often large when detected and usually occurs in young women, has a favorable prognosis if treated surgically. Thus, it is important to distinguish this lesion from other pancreatic neoplasms with regard to the choice of therapy. Possible cytologic differential diagnoses and the aid of electron microscopy in this context are discussed.