Cancer that affects the digestive system can be referred as Gastrointestinal cancer. This includes cancers of the oesophagus,gallbladder, liver, pancreas, stomach, small intestine, bowel, and anus. This book describes the topics related to clinicalimportance in this field along with a comprehensive discussion on the relevant issues. This book focuses on new andevolving concepts with regards to GI cancers. This book discusses the etiology, epidemiology, endoscopic diagnosis, use ofendoscopic techniques, and the role of endoscopic interventions for all major GI cancers. This book covers endoscopictechniques with or without magnification, as well as endoscopic optical techniques which allow us to obtain "e;realtime"e;biopsies of the GI tract. This book covers number of images. It will provide clinicians a better and informed knowledge aboutthe various approaches for the endoscopic diagnosis and treatment of patients with premalignant and malignant diseases ofthe GI tract. Language of the book is lucid. The superb content of this book will be met with great enthusiasm by thegastrointestinal fraternity and is helpful in further raising the level of expertise in academic and clinical practice.