Gastroenterology and hepatology encompass a vast anatomical assortment of organs that have diverse structure and function and potentially are afflicted by a multiplicity of disease processes. This book is designed to assist both physicians in-training who are preparing for the gastroenterology board examination and the increasing number of gastroenterologists awaiting recertification. It is not intended to replace the many more encyclopedic textbooks of gastroenterology, hepatology, pathology, endoscopy, nutrition, and radiology now available. Nor is it intended to serve as an “update” to physicians looking for the newest advances in the science and art of gastroenterology and hepatology. Instead, the book provides a core of essential knowledge in gastroenterology, hepatology, and integral related areas of pathology, endoscopy, nutrition, and radiology. Clinical knowledge related to diagnostic and therapeutic approaches to patient management is emphasized. Case-based presentations and short board examination-type, single-best-answer multiple-choice questions with annotated answers are featured. This text also is intended to be used by medical students and residents during their clerkships in internal medicine and gastroenterology and by gastroenterology fellows in training. Physicians in practice should find this book to be a practical review for consolidating their knowledge in gastroenterology and hepatology.