Summary of the incidence of extracolonic manifestations in FAP families
| Extracolonic manifestation | Group C1 | Group C2 | Group C3 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Negative | Positive | Negative | Positive | Negative | Positive | ||||||
| Desmoids | 9 | 1 | 22 | 3 | 0 | 11 | |||||
| Osteomas | 7 | 0 | 16 | 13 | 0 | 6 | |||||
| Epidermoid cysts | 7 | 3 | 11 | 11 | 0 | 7 | |||||
| Duodenal adenomas | 7 | 4 | 23 | 2 | 0 | 1 | |||||
| Gastric adenomas | 7 | 3 | 18 | 6 | 1 | 1 | |||||
| Dental anomalies | 6 | 1 | 6 | 2 | 1 | 0 | |||||
| Hepatoblastoma | 9 | 0 | 5 | 3 | 1 | 0 | |||||
| Periampullary cancer | 7 | 0 | 10 | 2 | 0 | 1 | |||||
| Brain tumour | 8 | 0 | 9 | 1 | 1 | 0 | |||||
The table shows the incidence of each extracolonic manifestation (ECM) in three CHRPE subgroups, C1 (codons 177-452), C2 (codons 457-1309), and C3 (codons 1395-1493). For each mutation subgroup, the number of patients found to be negative and positive for each of the nine ECMs is given in the appropriate columns.