대부분의 십이지장 천공은 증상을 유발하므로 급성기에 발견된다. 그러므로 시기를 알 수 없이 우연히 발견된 만성 십이지장 천공은 드물고 치료의 기준도 명확하지 않다. 본 증례 경우에는 보존적 치료 후에 병변이 호전되었다. 이와 같이 우연히 천공이 발견된 증례는 드물고 향후 관심이 필 요할 것으로 사료되어 문헌 고찰과 함께 보고한다.
Duodenal perforation can occur due to complications caused by ulcers, other inflammation or by the instrument used during the procedure such as endoscopy, endoscopic retrograde cholangiopancreatography (ERCP); however, its incidence is not high. Most cases of perforation of the lateral wall of the duodenum are acute and require immediate surgical or endoscopic treatment. Cases of chronic duodenal perforation are rarely reported. This report presents the case of a previous perforation that was discovered unexpectedly during ERCP in a patient with cholangitis due to common bile duct stones. The time of occurrence of the perforation was unknown. After medical treatment, the patient was able to return to daily life. We have reported this case along with a literature review.