Table 2a Spigelman Staging [33] of Duodenal Polyposis
From: In the Beginning There Was Colectomy: Current Surgical Options in Familial Adenomatous Polyposis
| Â | Points assigned | ||
|---|---|---|---|
Characteristic | 1 | 2 | 3 |
No. of polyps | 1 to 4 | 5 to 20 | >20 |
Polyp size (mm) | 1 to 4 | 5 to 10 | >10 |
Histology | tubular | tubulovillous | villous |
Dysplasia | mild | moderate | severe |
Scoring system: | Â | Â | Â |
   Stage 0 = 0 points |  |  |  |
   Stage I = 1 to 4 points |  |  |  |
   Stage II = 5 to 6 points |  |  |  |
   Stage III = 7 to 8 points |  |  |  |
   Stage IV = 9 to 12 points |  |  |  |