Endoscopic ultrasonography-guided intervention has gradually become a standard treatment for peripancreatic fluid collections (PFCs). However, it is difficult to popularize the procedure in Korea because of restrictions on insurance claims regarding the use of endoscopic accessories, as well as the lack of standardized Korean clinical practice guidelines. The Korean Society of Gastrointestinal Endoscopy (appointed a Task Force to develope medical guidelines by referring to the manual for clinical practice guidelines development prepared by the National Evidence-Based Healthcare Collaborating Agency. Previous studies on PFCs were searched, and certain studies were selected with the help of experts. Then, a set of key questions was selected, and treatment guidelines were systematically reviewed. Answers to these questions and recommendations were selected via peer review. This guideline discusses endoscopic management of PFCs and makes recommendations on indication for the procedure, pre-procedural preparations, optimal approach for drainage, procedural considerations (e.g., types of stent, advantages and disadvantages of plastic and metal stents, and accessories), adverse events of endoscopic intervention, and procedural quality issues. This guideline was reviewed by external experts and suggests best practices recommended based on the evidence available at the time of preparation. This will be revised as necessary to address advances and changes in technology and evidence obtained in clinical practice and future studies.

INTRODUCTION
MAIN BODY
    1. Formation of committee members and stakeholderinvolvement
    2. Process of developing treatment guidelines andselection of key questions
    3. Literature search and selection
    4. Evidence assessment and formulating recommendations
    5. Review and approval
    6. Distribution and revision of the treatmentguidelines
    7. Limitations of the treatment guidelines
    8. Editorial independence
RECOMMENDATIONS
    1. Acute peripancreatic fluid collections (APFCs)
    2. Pancreatic pseudocysts
    3. Acute necrotic collection (ANC)
    4. Walled-off necrosis (WON)
    1. Types of drainage
    2. Endoscopic transmural drainage
    3. Endoscopic ultrasound-guided transmuraldrainage (EUS-TD)
    4. Transpapillary pancreatic duct drainage (TPDD)
5. Comparison between ETD and EUS-TD
CONCLUSION
요 약
ACKNOWLEDGMENTS
REFERENCES

• 오치혁(경희대학교병원 소화기내과) | Chi Hyuk Oh (Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University Hospital, Seoul)
• 송태준(서울아산병원 소화기내과) | Tae Jun Song (Division of Gastroenterology, Department of Internal Medicine, Asan Medical Center, Seoul) Corresponding author
• 이준규(동국대학교 일산병원 소화기내과) | Jun Kyu Lee (Division of Gastroenterology, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang) Corresponding author
• 박진석(인하대학교병원 소화기내과) | Jin-Seok Park (Division of Gastroenterology, Department of Internal Medicine, Inha University Hospital, Incheon)
• 이재민(고려대학교 안암병원 소화기내과) | Jae Min Lee (Division of Gastroenterology, Department of Internal Medicine, Korea University Anam Hospital, Seoul)
• 손준혁(인제대학교 일산백병원 소화기내과) | Jun Hyuk Son (Division of Gastroenterology, Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang)
• 장동기(동국대학교 일산병원 소화기내과) | Dong Kee Jang (Division of Gastroenterology, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang)
• 최미영(한국보건의료연구원) | Miyoung Choi (National Evidence-based Healthcare Collaborating Agency, Seoul)
• 변정식(서울아산병원 소화기내과) | Jeong-Sik Byeon (Division of Gastroenterology, Department of Internal Medicine, Asan Medical Center, Seoul)
• 이인석(가톨릭대학교 서울성모병원 소화기내과) | In Seok Lee (Division of Gastroenterology, Department of Internal Medicine, The Catholic University of Korea Seoul ST. Mary’s Hospital, Seoul)
• 이수택(전북대학교병원 소화기내과) | Soo Teik Lee (Division of Gastroenterology, Department of Internal Medicine, Jeonbuk National University Hospital, Jeonju)
• 최호순(한양대학교병원 소화기내과) | Ho Soon Choi (Division of Gastroenterology, Department of Internal Medicine, Hanyang University Seoul Hospital, Seoul)
• 김호각(대구가톨릭대학교병원 소화기내과) | Ho Gak Kim (Division of Gastroenterology, Department of Internal Medicine, Daegu Catholic University Hospital, Daegu)
• 전훈재(고려대학교 안암병원 소화기내과) | Hoon Jai Chun (Division of Gastroenterology, Department of Internal Medicine, Korea University Anam Hospital, Seoul)
• 박찬국(조선대학교병원 소화기내과) | Chan Guk Park (Division of Gastroenterology, Department of Internal Medicine, Chosun University Hospital, Gwangju)
• 조주영(분당차병원 소화기내과) | Joo Young Cho (Division of Gastroenterology, Department of Internal Medicine, Cha University Bundang Medical Center, Seongnam, Korea)