目的 探讨儿童十二指肠重复畸形的临床表现及内镜下治疗方案。方法 回顾分析1例十二指肠重复畸形 患儿的临床资料。结果 13岁男性患儿，反复腹痛4年。血淀粉酶、脂肪酶均升高；腹部CT可见囊性包块。确诊为十二指 肠重复畸形。经过内镜下开窗治疗，患儿腹痛消失，随访半年切口愈合良好。结论 十二指肠重复畸形是罕见的消化道畸 形，在一定条件下，内镜下开窗治疗可作为首选治疗方案。

Objective To explore the clinical manifestations and endoscopic treatment of duodenal duplication in children. Method The clinical data of duodenal duplication in a child was analyzed retrospectively. Result A 13 -year-old boy presented with recurrent abdominal pain for 4 years. Blood amylase and lipase were elevated, and abdominal CT showed cystic mass, so the child was diagnosed with duodenal duplication. After endoscopic fenestration treatment, the child’s abdominal pain disappeared, and the incision healed well at the six-month follow-up. Conclusion Duodenal duplication is a rare malformation of the digestive tract. Under certain conditions, endoscopic fenestration can be the first choice for treatment.