Cold Snare Polypectomy for Small Bowel Polyps in Patients With Peutz-Jeghers Syndrome

Inclusion Criteria: * Age 8-60, male or female. * Diagnosed with Peutz-Jeghers Syndrome * Undergo enteroscopy for small bowel polypectomy. Exclusion Criteria: * Absence of at least one study polyp (5-9mm stubby pedicle, wide pedicle and sessile small bowel polyps); * Be evaluated during enteroscopy for requiring surgical intervention (such as endoscopically difficult to handle giant polyps, intussusception, etc.)； * With more than 50 polyps ≥1cm found in this enteroscopy examination; * The polyp has been confirmed to be malignant by pathology, or highly suspicious of malignant transformation under endoscopy; * Receiving anticoagulant therapy during this treatment; * Unable or unwilling to provide informed consent.