Table 3

Genetic testing and outcome in 100%, 50%, and 25% risk carriers in the 18 HNPCC families

25%
Pre-test risk100%50%Parent aliveParent deadTotalTotal
Number603086491155523
Tested52 (87%)175 (57%)3 (5%)30 (33%)33 (21%)260 (50%)
Mutation carrier50 (96%)80 (46%)03 (10%)3 (9%)133 (51%)