Case ReviewsIntraductal Papillary Mucinous Neoplasms, Oncocytic TypeTerris, Benoît MD, PhDAuthor Information From the Service d'Anatomie Pathologique, Hôpital Cochin, Université Paris Descartes, France. Reprints: Benoît Terris, MD, PhD, Serice d'Anatomie pathologique, Hôpital Cochin, Rue du Faubourg Saint-Jacques, 75679 Paris Cedex 14, France. E-mail: [email protected]. Pathology Case Reviews: November-December 2010 - Volume 15 - Issue 6 - p 195-198 doi: 10.1097/PCR.0b013e3181ffaf1f Buy Metrics Abstract According to their histologic features and their mucin profile, intraductal papillary mucinous neoplasms form a group of heterogeneous cystic pancreatic neoplasms. Intraductal oncocytic papillary neoplasms constitute a rare phenotypic variant of intraductal papillary mucinous neoplasms. They correspond to a grossly visible intraductal neoplasm involving the main pancreatic duct and/or its branch ducts composed of cells with prominent oncocytic differentiation. Some scattered goblet cells are intermingled. This cellular proliferation forms complex thick papillae and frequently exhibits high-grade dysplasia. However, the prognosis after surgical resection seems usually good, as an invasive component is present in less than 20% of cases. © 2010 Lippincott Williams & Wilkins, Inc.