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The Spigelman score
| 0 points | 1 point | 2 points | 3 points | |
|---|---|---|---|---|
| Number of polyps | 0 | 1–4 | 5–20 | >20 |
| Size of polyps (mm) | 0 | 1–4 | 5–10 | >10 |
| Histology | Normal | Tubular | Tubulovillous | Villous |
| Dysplasia | None | Low grade | High grade |
0 points = stage 0; 1–4 points = stage I; 5–6 points = stage II; 7–8 points = stage III; 9–12 points = stage IV.
