Genetic testing is an accurate way to predict disease.
Many genetic tests now commercially available, including tests for such complex conditions as breast cancer, cannot predict whether a person will actually develop the disease, but only if they have a genetic predisposition and a greater likelihood of developing cancer. Many people who test positive for genetic mutations associated with certain conditions will never develop those conditions. Moreover, while individuals with genetic mutations associated with certain diseases like cancer may be at higher risk, there are many factors which determine whether someone will actually develop the disease. Most health care providers do not have training in genetics, and many who order genetic tests may not know how to interpret the results. There is no requirement for genetic counseling in commercial or many clinical settings, so individuals and their doctors often do not understand what the results of a genetic test really mean for the individual or family members.