1) To study the uncommon masses in the pancreas, which include rare path-proven lesions, weird presentations of common masses, and co-existent 2 or 3 separate pathologic entities in one pancreas.2) To study the complications of the pancreatic masses.
TABLE OF CONTENTS/OUTLINE1) Common masses gone wild: A) Main duct intraductal papillary mucinous neoplasm (IPMN) causing biliary dilatation. B) Multiple growing cysts: IPMN vs. mucinous cystic neoplasm on path. C) Solitary papillary epithelial neoplasm (SPEN) with widespread metastasis. D) Adenocarcinoma with drop pelvic metastasis.2) Rare path-proven masses: A) mixed acinar-endocrine carcinoma. B) myofibroblastic sarcoma. C) intraductal oncocytic papillary neoplasm (IOPN). D) multifocal acinar cell cystadenoma.3) Multiple entities in one pancreas: A) serous cystadenoma and IPMN. B) adenocarcinoma and IPMN. C) serous cystadenoma and adenocarcinoma. D) neuroendocrine, serous cystadenoma, and simple cysts in Von Hippel-Lindau (VHL)4) Secondary involvement: A) plasmacytoma. B) B-cell lymphoma. C) lung metastasis.