Breast Cancer Gene Tests: Cost, Accuracy & What They Reveal

Question
Hi. I've heard of a test that will determine whether or not someone has the breast cancer gene. How much does this test cost? Are the results really accurate? Thanks

Answer
There are several such tests (different genes). So there are several genes involved. BUT they cover ONLY a small part of the total number of breast cancer cases! They are only useful in some of the cases with a clear family history. I live in Sweden. I have no idea what they may cost where you are.