Characteristics of adenomas identified at flexible sigmoidoscopy screening in 1833 individuals (per cent)
| Histological features | Diameter | ||||
|---|---|---|---|---|---|
| Type of adenoma | Dysplasia | <5 mm | 5–9 mm | ≥10 mm | Total |
| Tubular | Mild or moderate | 1175 (58) | 636 (32) | 206 (10) | 2017 (100) |
| Tubular | Severe | 11 (13) | 31 (37) | 41 (50) | 83 (100) |
| Villous components | Mild or moderate | 12 (9) | 54 (41) | 65 (50) | 131 (100) |
| Villous components | Severe | 1 (3) | 4 (12) | 29 (85) | 34 (100) |
| Total | 1199 (53) | 725 (32) | 341 (15) | 2265 (100) | |