Acute pancreatitis caused by eosinophilic gastroenteritis is a rare disease, and little has been reported so far. Diagnosing eosinophilic gastroenteritis is difficult because the symptoms and laboratory findings are not specific. We report a rare case of eosinophilic gastroenteritis related to acute pancreatitis as a possible cause of idiopathic acute pancreatitis. A 61-year-old man visited the hospital complaining of epigastric pain. Although no pancreatic abnormalities were confirmed on imaging studies, the patient showed hyperamylasemia and hyperlipasemia. Serum eosinophil fractions were initially normal. However, they were elevated on follow-up examinations, and a large number of eosinophils were observed in the biopsies of the stomach and duodenum, which led to the diagnosis of eosinophilic gastroduodenitis related to acute pancreatitis.

호산구성 장염에 의한 급성 췌장염은 매우 드문 질환으로 증상 및 검사실 소견이 특별하지 않아 진단이 어렵다. 급성 췌장염의 원인이 명확하지 않은 경우, 가능한 원인으로 매우 드물지만 호산구성 위장염이 있을 수 있으며, 본 저자들은 호산구성 위십이지장염에 의해 발생한 재발성 급성 췌장염을 진단하고 류코트리엔 수용체 길항제로 치료하였던 증례를 문헌고찰과 함께 보고한다.

• 성태호(가톨릭대학교 의과대학 내과학교실) | Tae Ho Sung (Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul)
• 이정윤(가톨릭대학교 의과대학 내과학교실) | Jung Yun Lee (Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul)
• 김유일(가톨릭대학교 의과대학 병원병리과학교실) | Yu IL Kim (Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea)
• 김효석(가톨릭대학교 의과대학 내과학교실) | Hyo Suk Kim (Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul)
• 권태근(가톨릭대학교 의과대학 내과학교실) | Tae-Geun Gweon (Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul)
• 김태호(가톨릭대학교 의과대학 내과학교실) | Tae Ho Kim (Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul)
• 김창환(가톨릭대학교 의과대학 내과학교실) | Chang Whan Kim (Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul)
• 장재혁(가톨릭대학교 의과대학 내과학교실) | Jae Hyuck Chang (Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul) Corresponding author