Genetic screening for prostate cancer
Genes regulate the growth, multiplication, and death of all human cells. Cancer develops when cell growth escapes from the normal control that holds it in check. In a fundamental sense, then, all cancers depend on genetic abnormalities.
In some cases, abnormal genes are passed down from parent to child. In others, problems develop after birth as a result of environmental influences, including nutritional imbalances and exposure to tobacco, radiation, and toxins.
If genes are responsible for cancer, then therapies that target genetic abnormalities should be beneficial. That possibility lies in the future, but we are already at the point where genetic testing can predict the risk of certain cancers. The breast cancer genes BRCA1 and BRCA2 are the best-known examples.