Dr. Dong Wan Seo is one of the best endoscopists you can find in the Asian-Pacific region. His specialty is pancreatico-biliary endoscopy and EUS. He graduated from prestigious Seoul National University Medical College in 1987 and served 3 years in Boeun Sanitary Center as a part of military service. Later he joined Asan Medical Center, University of Ulsan Medical College and received his internal medicine residency training and gastroenterology fellowship training. From 1997, he started his professional career as an instructor in the same hospital. His current position is a full professor of Department of Gastroenterology, University of Ulsan Medical College, Asan Medical Center which is the largest teaching hospital in South Korea. Dr. Seo received several awards, including young investigator award from APDW 1996 and IAP 1998. He also received audio-visual award from ASGE 1999. He published a book ‘Cholangioscopy’ in 2002 which is the first book dedicated only to various techniques and findings of cholangioscopy. He also wrote several book chapters in the field of ERCP, EUS and cholangioscopy. He has created a lot of advanced endoscopy works to the World of GI Endoscopy including his own classification of cholangioscopic reading, EUS-guided treatment of pancreatic cystic tumors. Prof. Seo is also serving as a chairperson of Endoscopy Teleconference Session in APAN meeting and scientific committee of SGI meeting. He is working as an active member in variety of national & international societies including KSGE, KSG, SGI, ASGE and NOSCAR. He is also serving as an international editorial board member of Gastrointestinal Endoscopy.