This book serves as a valuable resource for surgeons and health care providers at all stages of their career caring for patients with colorectal disease. This edition provides all newly written chapters, organized around the “pillars” of colorectal disease: perioperative (including endoscopy); anorectal disease; benign disease (including inflammatory bowel disease); malignancy; pelvic floor disorders; and a “miscellaneous” section that covers aspects both inside and beyond the operating room. Chapters are formatted to follow that of a “how to” manual as well as an algorithm-based guide to allow the reader to understand the thought process behind a proposed treatment strategy. By making use of evidence-based recommendations, each chapter includes not only background information and diagnostic/therapeutic guidelines, but also provides operative technical details and perioperative “tips and tricks” that are utilized in the management of these complex surgical challenges. Chapters also include the assessment of risk and methods utilized to minimize perioperative complications. In addition, the book incorporates sections covering the medical and surgical therapies for abdominal, pelvic and anorectal disease.      Written by experts in the field from around the world, The ASCRS Textbook of Colon and Rectal Surgery 4th Edition exposes the many critical gaps in our knowledge base and inspires the next generation to answer them through thoughtful and high level scientific inquiry.