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| Extracolonic manifestation | Prevalence in FAP patients |
|---|---|
| CHRPE | 70–75% |
| Osteomas and dental abnormalities | 70–90% |
| Upper GI tumors | 50–90% |
| Epidermoid cysts and lipomas | 25–50% |
| Desmoid tumors | 15–20% |
| Adrenal tumors | 7–13% |
| Papillary thyroid cancer | 1-2% |
| Hepatoblastoma | 1-2% |
| Brain Tumors (Medulloblastoma and others) | 1-2% |
| Pancreatic Cancer | 1% |
