“Clinical Cases of Digestive System” collected 14 difficult cases of digestive system, each case from the clinical diagnosis and treatment process, diagnosis and treatment difficulties, knowledge review, references are introduced, the content is wonderful, worth reading. This book has the following features: 1 case was representative. Twelve cases were selected from the Department of Gastroenterology. 2 Cases covered a wide range of organs of the digestive system. The case analysis was wonderful, with both the tortuous diagnosis and treatment and the logical outcome. 3 The knowledge points of the cases are clear. There are not only the summary of difficult points, but also the wonderful comments of domestic well-known experts, and each case is attached with references, which is convenient for readers to further study. The book collects the clinical experience and wisdom of the gastroenterologists, has important reference value for the cultivation of the clinical diagnosis and treatment thinking ability of young doctors, is suitable for the reading of the general training doctors, advanced students and graduate students of the general digestive specialty, and is suitable for the digestive specialist doctors with certain clinical experience. It is also a good book to expand the clinical horizon. In clinical practice, each case has both the commonness of the same disease and the particularity of the patient, so the diagnosis and treatment process is full of uncertainty. The cases in this book are no exception. Some cases may have different, or even better, treatment routes. Given the editor’s theoretical level and clinical experience, there are bound to be imperfections or errors. The majority of readers are generous in giving advice.