Encyclopedic information regarding the procedure of endoscopy has been illuminated in this book. Endoscopy has played a vital role in the development of modern medicine and other medical specialties. The field of endoscopic procedure has evolved over the last decade. By using varied information, it has provided a better understanding regarding pathogenic mechanisms, description of new entities and applications for early detection, diagnostic procedures and therapeutic procedures. The benefits of various technical advances and modern endoscopic equipment have led to a dynamic evolution of endoscopy. Consequently, endoscopy has outweighed its function as just an examination tool and it has become a rapid and efficient therapeutic tool for various organs including gastrointestinal tract, head and neck, respiratory tract and others. This book is an evidence of the efficacy and usefulness of endoscopy.