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Recommendations for management of duodenal polyposis in familial adenomatous polyposis, adjusted to the Spigelman stage of duodenal polyposis
| Spigelman stage | Endoscopic frequency | Chemoprevention | Surgery |
| Stage 0 | 4 years | No | No |
| Stage I | 2–3 years | No | No |
| Stage II | 2–3 years | +/− | No |
| Stage III | 6–12 months | +/− | +/− |
| Stage IV | 6–12 months | +/− | Yes |
