This book on constipation in children contains a complete update of this common problem in the world. It has been written by authors from 9 countries, who are experts in this field. In most cases, constipation is functional in origin, but one mustnt forget the organic causes such as Hirschsprungs disease, endocrine-metabolic disorders (Hypotiroidism, hypokalemia) or digestive diseases such as celiac disease or cystic fibrosis. Over the course of 18 chapters, this book describes the epidemiology and genetics of constipation, the anatomophysiology of defecation, ætiology, physiopathology, anterior ectopic anus, clinical evaluation, diagnostic testing of defecation disorders, colonic dysmotility, differential diagnosis (functional vs. organic), and several treatment options (medical and surgical). The book ends with long-term results in children with chronic constipation, and with the latest advances in future cellular therapies (Stem Cells) for defecation disorders.