Hoon Jai Chun is Professor and Chief of the Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea. Dr. Chun has established various methods of endoscopic treatment for gastrointestinal diseases and holds numerous patents related to endoscopic diagnostic and therapeutic devices. Furthermore, he has undertaken research studies on prevention and treatment of functional gastrointestinal disease, Helicobacter pylori infection and gastrointestinal cancer. Dr. Chun has served as Secretary General of the Korean Society of Gastrointestinal Endoscopy and Secretary General of the Korean Society of Gastrointestinal Cancer. Dr. Chun is also a member of many international gastroenterology societies, including the European Society of Gastrointestinal Endoscopy (ESGE) and Japan Gastroenterological Endoscopy Society (JGES), and is a Fellow of both the American Gastroenterological Association (AGAF) and the American Society of Gastrointestinal Endoscopy (FASGE). He has published more than 400 full scientific articles in the foremost journals and written numerous book chapters. Dr. Chun has also been an editor and a reviewer of more than 15 prestigious international journals. His contributions to the medical sciences and academic advancement have been recognized with many domestic and international academic awards.

Myung-Gyu Choi graduated from the College of Medicine, the Catholic University of Korea, in 1982 and completed his internship and residency in Internal Medicine at St. Mary's Hospital of the Catholic University of Korea. After obtaining his PhDfrom the same graduate schoolin 1993, he served as a visiting scientist at the Mayo Clinic, USA from 1995 to 1997. He is currently Director of the Gastroenterology Center of Seoul St. Mary's Hospital and Professor in the Department of Internal Medicine at The Catholic University of Korea. Dr. Choi is a pre-eminent leader ingastroenterology, with a particular interest in clinical endoscopy and enteric neuroscience. He is current President of the Korean Society of Gastrointestinal Endoscopy and was President of the Korean Society of Neurogastroenterology and Motility from 2007 to 2009. Dr. Choi has served as leader of the Korean Gut Image Study Group during the past decade, which has overseen the National Capsule Endoscopy Registry. He has also made important contributions in developing diagnostic and treatment guidelines for gastrointestinal diseases in Korea. He has published over 200 original articles in national and international journals.

Suk-KyunYang is Professor of Gastroenterology at University of Ulsan College of Medicine and Director of the Inflammatory Bowel Disease Center at Asan Medical Center, Seoul, Korea. Dr. Yang earned his MD at Seoul National University College of Medicine and completed his residency in Internal Medicine at Seoul National University Hospital and his fellowship in Gastroenterology at Asan Medical Center. He obtained his postdoctoral research fellowship at the Mucosal Immunology Laboratory of University of California, San [...].Yang is an active member of the Korean Association for the Study of Intestinal Diseases (KASID) and serves as president of the [...] has also served as a board member of many national societies, including the Korean Society of Gastrointestinal Endoscopy and the Korean Society of [...]. Yang has published over 200 original articles and has written numerous book chapters. He has also written two colonoscopic atlases: Colonoscopic Diagnosis (Koonja Publishing, 1999) and Colonoscopy:Diagnosis and Treatment (Koonja Publishing, 2009). His research interests include the epidemiology,genetics, and endoscopic diagnosis of inflammatory bowel disease.

Chapter 1. Normal upper GI findings and normal variants.- Chapter 2. Laryngopharyngeal diseases.- Chapter 3. Infectious and noninfectious esophagitis.- Chapter 4. Reflux esophagitis and Barrett's esophagus.- Chapter 5. Benign esophageal tumors.- Chapter 6. Esophageal cancer.- Chapter 7. Miscellaneous esophageal diseases.- Chapter 8. Gastritis and gastric ulcers.- Chapter 9. GIST and other subepithelial tumors.- Chapter 10. Gastric polyps and dysplasias.- Chapter 11. Early gastric cancers.- Chapter 12. Advanced gastric cancers.- Chapter 13. Gastric lymphoma and other gastric neoplasms.- Chapter 14. Miscellaneous gastric diseases.- Chapter 15. Duodenitis and duodenal ulcers.- Chapter 16. Duodenal Tumors.- Chapter 17. Miscellaneous duodenal diseases.- Chapter 18. Normal colonoscopy findings.- Chapter 19. Idiopathic inflammatory bowel diseases.- Chapter 20. Inflammatory diseases of colon other than idiopathic IBD.- Chapter 21. Colorectal polyps and polyposis.- Chapter 22. Malignant tumors in colon.- Chapter 23. Diverticular and vascular diseases in colon.- Chapter 24. Anorectal diseases.- Chapter 25. Miscellaneous lesions in the colon.- Chapter 26. Normal small bowel findings and variants.- Chapter 27. Inflammatory lesions of the small bowel.- Chapter 28. Inflammatory lesions of the small bowel other than inflammatory bowel disease.- Chapter 29. Tumorous lesions of the small bowel.- Chapter 30. Vascular and miscellaneous lesions of the small bowel.