Table 2

 Results of MYH mutation analysis in relation to cumulative polyp counts among 170 patients (metachronous)

Number of polypsNumber of patientsBiallelic carriersMonoallelic carriersAge at diagnosis (mean), years
*Number of polyps not defined.
UV, unclassified variant.
1–93301 (1 UV)22–73 (47)
10–998324 (29%)3 (1 UV)12–76 (46)
100–1000247 (29%)112–67 (41)
>100010048
Polyposis177 (41%)021–59 (41)
Multiple102 (20%)116–64 (46)
Unknown*200
Total17040 (24%)6 (2 UV) (3.5%)12–76 (45)