Many pathologists and some clinicians notice in practical services that several biliary tract diseases resemble pathologically and even biologically some pancreatic diseases. In this book, the authors provide the anatomic and biological basis and characteristics for the occurrence of similar features in several diseases of the biliary tract and pancreas, and also the reasons why they propose the new disease concept known as biliary diseases with pancreatic counterparts. This book provides a comprehensive overview of several representative biliary diseases with pancreatic counterparts, from basic understanding to practical aspects, and presents the latest advances. The contributing authors extensively discuss the topic from different perspectives, including diseases such as IgG4-related diseases involving the pancreas and biliary tract, intraductal papillary neoplasm and intraductal tubulopapillary neoplasm of the bile duct and pancreas, invasive adenocarcinoma of the pancreas and biliary tract and their precursor lesions, and alcoholic pancreatitis and adenitis of the peribiliary glands, and so on. Biliary Diseases with Pancreatic Counterparts: A New Disease Concept is a valuable resource for clinicians in various disciplines, such as internal medicine, surgery, pathology and radiology. It allows biliary researchers and practitioners to broaden their understanding of the subject, and further explore the latest findings in clinicopathological features of these biliary tract and pancreatic diseases.