Surveillance Colonoscopy Frequency for Sessile Serrated Adenomas
Risk Stratification Based on SSA Characteristics
- Patients with 1-2 sessile serrated polyps <10 mm without dysplasia should undergo surveillance colonoscopy in 5-10 years, according to the American Gastroenterological Association 1
- The British Society of Gastroenterology recommends 3-year surveillance for multiple SSAs, noting that three or more serrated polyps are an independent predictor of synchronous advanced neoplasia 2, 3
- Any SSA ≥10 mm requires 3-year surveillance colonoscopy, as recommended by the American Gastroenterological Association 1
- Any SSA with dysplasia (regardless of size) requires 3-year surveillance, according to the American Gastroenterological Association 1
- Patients with piecemeal resection of SSAs ≥20 mm should undergo follow-up colonoscopy at 6 months to verify complete removal, as recommended by the American Gastroenterological Association 1
Critical Quality Assumptions
- Complete examination to cecum, bowel preparation adequate to detect lesions >5 mm, and high confidence of complete polyp resection are assumed for surveillance recommendations, according to the American Gastroenterological Association 1
- If any of these quality metrics are not met, shorter surveillance intervals should be considered, as recommended by the American Gastroenterological Association 1
Combined Adenomas and Serrated Polyps
- When both adenomas and serrated polyps are present, evaluate each polyp group separately and apply the shortest recommended surveillance interval, according to the British Society of Gastroenterology 2, 3