2012 Recommendations for Surveillance and Screening Intervals in Individuals With Baseline Average Risk
| Baseline colonoscopy: most advanced finding(s) | Recommended surveillance interval (y) |
| No polyps | 10 |
| Small (<10 mm) hyperplastic polyps in rectum or sigmoid | 10 |
| 1–2 small (<10 mm) tubular adenomas | 5–10 |
| 3–10 tubular adenomas | 3 |
| >10 adenomas | <3 |
| One or more tubular adenomas ≥10 mm | 3 |
| One or more villous adenomas | 3 |
| Adenoma with HGD | 3 |
| Sessile serrated polyp(s) <10 mm with no dysplasia | 5 |
| Sessile serrated polyp(s) ≥10 mm OR Sessile serrated polyp with dysplasia OR Traditional serrated adenoma |
3 |
| Serrated polyposis syndromea | 1 |
From the American College of Gastroenterology.
NOTE. The recommendations assume that the baseline colonoscopy was complete and adequate and that all visible polyps were completely removed.
HGD = High-Grade Dysplasia
aBased on the World Health Organization definition of serrated polyposis syndrome, with one of the following criteria:
(1) at least 5 serrated polyps proximal to sigmoid, with 2 or more ≥10 mm;
(2) any serrated polyps proximal to sigmoid with family history of serrated polyposis syndrome; and
(3) >20 serrated polyps of any size throughout the colon.