Intraductal papillary mucinous neoplasms (IPMNs) represent an opportunity to treat pancreatic tumors before they develop into aggressive, hard-to-treat cancers. Beginning with morphological classification and its clinical significance, natural history, and malignant change of both main duct and branch duct IPMNs, this book covers the whole field of IPMNs of the pancreas. It reviews the various methods of investigation: imaging, diagnostic investigation of cyst fluid, and those using pancreatic juice; and also examines aspects ranging from the development of malignancy to the timing and method of resection, focusing on both main duct and branch duct IPMNs. Aimed at residents, clinical fellows, and pancreatologists who treat patients with this common disease of the pancreas, this book is a landmark in the current understanding and future perspectives of IPMNs of the pancreas.