Prevalence of the different types of serrated lesion within the colorectum (adapted from Bettington et al unless otherwise stated)5
| Lesion | Suggested prevalence |
|---|---|
| Hyperplastic polyp | 25–30% of all colorectal polyps 10–20% of Western adults |
| Sessile serrated lesion (SSL) | 1.7–9% of all colorectal polyps |
| SSL with ‘conventional’ dysplasia | 13.2% of all SSLs6 |
| Traditional serrated adenoma | 0.6–1.9% of all colorectal polyps |
| Serrated adenocarcinoma | 9–12% of all colorectal adenocarcinomas3 |