This book covers the diagnosis and treatment of various types of gastric cancer, and details the clinical process of gastric cancer treatment. Authors collects 37 clinical cases, which are typical gastric cancer cases with complicated disease or metastasis. In each case, the patient's gastroscopic results, abdominal CT images, pathological results and treatment process were analysed in detail. Combined with the expert's precise comments, the surgical treatment method and postoperative radiotherapy and chemotherapy and other treatment schemes of each case were clearly explained in an orderly manner.