Abstract 10, Table 1 Classification of the severity of duodenal polyposis (Spigelman et al. Lancet 1989;2:783–5)
| No. of points (pts) | |||
|---|---|---|---|
| 1 | 2 | 3 | |
| No. of polyps | 1–4 | 5–20 | >20 |
| Polyp size (mm) | 1–4 | 5–20 | >10 |
| Histology | tubulous | tubulovillous | villous |
| Dysplasia | mild | moderate | severe |
Stage 0, 0pts; stage I, 1–4 pts; stage II, 5–6 pts; stage III, 7–8 pts; stage IV, 9–12 pts.