From: Familial Adenomatous Polyposis: Experience from a Study of 1164 Unrelated German Polyposis Patients
 |  | Site of mutation | ||
---|---|---|---|---|
 | All | 5' to codon 1444 | 3' to codon 1444 | large deletions |
All patients | 1379 | 1169 | 132 | 78 |
Desmoids | Â | Â | Â | Â |
   present | 76 | 52 | 19 | 5 |
   absent | 304 | 267 | 22 | 15 |
   all* | 380 | 319 | 41 | 20 |
   % desmoids | 20% | 16% | 46% | 25% |
   % desmoids (minimal estimate)** | (5%) | (4%) | (14%) | (6%) |
Osteomas | Â | Â | Â | Â |
   present | 65 | 36 | 28 | 1 |
   absent | 130 | 115 | 8 | 7 |
   all* | 195 | 151 | 36 | 8 |
   % osteomas | 33% | 23% | 78% | 12% |
   % osteomas (minimal estimate)** | (5%) | (3%) | (21%) | (1%) |