The gastrointestinal tract is responsible for the assimilation of food and expulsion of wastes in the form of feces. Various organs are responsible for these functions, including mouth, the esophagus, stomach and intestines. Gastrointestinal surgery can be classified into two parts, i.e., upper gastrointestinal surgery and lower gastrointestinal surgery. Upper gastrointestinal surgery is the practice of surgery which focuses on the upper parts of the gastrointestinal tract. Lower gastrointestinal surgery is the type of surgery which is concerned with colorectal surgery and the surgery of the small intestine. This book unravels the recent studies in the field of gastrointestinal surgery. It will also provide interesting topics for research which interested readers can take up. Researchers, doctors and students in the field of gastroenterology will be assisted by this book.