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

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