certainly is a sign of inheritance if there are more than 2 affected and if one of the affected dizzee ungar than 50 dad for example would be something suspicious so if there are several of family members who have affected by say colon cancer oppressed cancer which you advise to get tested i would advise that you get a genetic counseling so that someone can explain to you what these tests mean and also you know you can one can discuss the pedigree and can see if this is really. falls into the same category of the type of cancer that you think is suspicious for genetic cause or not and other tests very accurate the tests themselves are very accurate test you i can tell you whether you have a mutation or not what we cannot tell exactly is when and. you know really if you will get the disease or not we can only give you a certain percentage there are some internet services especially in the united states of america where you can as a patient just buy those tests over the internet with no consultation at all so how do you judge those kinds of tests well the problem i think with many of these tes