The first part of this volume on visceral surgery deals with the surgical characteristics and diseases of the anterior abdominal wall. It presents the types of hernias and the options for their surgical treatment. The remaining sections of the volume are devoted to surgery of the gastrointestinal tract. The laboratory and instrumental diagnostic options are briefly described, as well as the invasive non-surgical treatment methods used. The etiology, pathogenesis, clinical picture, diagnostic and differential diagnostic options, prognosis, and the basic principles of conservative and surgical treatment of diseases of the stomach, duodenum, small intestine and mesentery, appendix, colon and rectum, anus and perianal space. The last part of the book discusses diseases of the retroperitoneal space and their surgical treatment.