Genetic Testing for Cancer
Even though over 90% of human cancers develop from mutations or genetic modifications that develop within one's lifetime, there are a few known genetic risk factors and cancers that run in families. The BRCA-1 and BRCA-2 genes are probably the most well-known genes that can increase a person's risk of developing cancer. These genes are mostly associated with breast and ovarian cancers, though they can also increase the risk of other cancers as well. Familial adenomatous polyposis (FAP) is another well-known, but relatively rare inherited condition that can predispose carriers to gastrointestinal cancers like colon cancer. People that carry these genes are not certain to get cancer, but it is important to be aware of the risk to ensure that cancer screening is started early, to be even more vigilant about lifestyle and healthy habits, and to talk with a genetic counselor, trusted oncologist or other medical provider to determine how to best reduce risks.
Most people don't qualify or wouldn't benefit from genetic testing for cancer, but to explore this more fully, see our resource section.
