Abstract: Peutz-Jeghers syndrome（PJS）is a rare autosomal dominant genetic disorder characterized by multiple gastrointestinal hamartomatous polyps.Symptoms can appear in childhood，and small intestinal polyps are likely to cause serious complications such as intussusception and bleeding. Double-balloon enteroscopy（DBE），as an important method for diagnosis and treatment of small intestinal diseases，provides the possibility for minimally invasive resection of small intestinal polyps in children with PJS. This article summarizes the characteristics of DBE diagnosis and treatment for small intestinal polyps in children with PJS，elaborates on the operative methods and key techniques（such as selection of insertion route，polyp localization，hemostasis strategies，etc.）of polyp resection under DBE，and analyzes surgical risks and countermeasures，aiming to provide practical reference for clinicians to improve the safety and effectiveness of diagnosis and treatment of small intestinal polyps in children with PJS.

Key words: double-balloon enteroscopy, child, Peutz-Jeghers syndrome, small intestinal polyps, resection techniques

摘要： Peutz-Jeghers综合征（PJS）是一种罕见的常染色体显性遗传病，以胃肠道多发错构瘤性息肉为主要特征，儿童期即可出现症状，小肠息肉易引发肠套叠、出血等严重并发症。双气囊小肠镜（DBE）作为小肠疾病诊疗的重要手段，为儿童PJS小肠息肉的微创切除提供了可能。该文总结儿童PJS小肠息肉的DBE诊疗特点，详细阐述DBE下息肉切除的操作方法及关键技巧（如进镜路径选择、息肉定位、止血策略等），分析手术风险及应对措施，旨在为临床医师提供实践参考，以提高儿童PJS小肠息肉的诊疗安全性和有效性。

关键词: 双气囊小肠镜, 儿童, Peutz-Jeghers综合征, 小肠息肉, 切除技巧