Represents the first complete and comprehensive textbook in gastrointestinal, liver, biliary, or pancreatic disorders, with special attention to providing the most relevant, up-to-date clinical, etiologic, and management information necesary for surgical pathologists to make clinically relevant diagnoses. The book is designed for general pathologists and pathologists in training, but particularly for those with a special interest or expertise in gastrointestinal, liver, biliary, or pancreatic disorders.