Book excerpt: The proposal for this book is to offer a systematic description of the most frequent complications occurring in the three parts of the digestive tract: HPB, Upper GI and colorectal tracts. Every complication, from esophageal to the rectum, is described systematically through two or three practical cases as has been treated by actual surgical practices of authors serving as surgeon practitioners. Description of the case, presentation of indication for surgery, type of primary surgical intervention and complication is described textually but also and by means of clinical signs, laboratory tests, radiological studies (CT scans and schematic drawings) and other methods used for diagnosis and treatment. The reader will have access to a practical book in which every current complication can be easily recognized, along with relevant information as guide for an adequate treatment.