Patients
We conducted an observational retrospective study which included all patients with PJS from Zhejiang Provincial People’s Hospital (People’s hospital of Hangzhou medical college, Hangzhou, China), a tertiary-care referral center, who had undergone SBE for polypectomy between January 2018 and March 2021. Medical records of all the included patients were retrospectively reviewed. The following data were collected: age, gender, history of laparotomy, the method of SBE insertion, number of SBE procedures performed, maximum size and number of the resected polys, and complications. A clinical diagnosis of PJS can be made when any one of the following was present: 1) two or more histologically confirmed PJS polyps; 2) any number of PJS polyps detected in one individual who has characteristic mucocutaneous pigmentation or a family history of PJS in close relative(s); and 3) characteristic mucocutaneous pigmentation in an individual who has a family history of PJS in close relative(s)[20]. The study protocol was approved by the Ethics Committee of Zhejiang Provincial People’s Hospital (Approval Number 2021QT244). This study was reviewed and approved by the Institutional. All information of patients in these records remained confidential.