By Mike Janicek, MD, Arizona Oncology
Genetic testing is a wonderful tool for physicians and patients. 5-10%, and in some cases up to 25% of certain cancers are due to an inherited genetic cause, or mutation, which is identifiable with genetic testing. Not only can this provide information that could impact treatment decisions if a person has cancer, but it allows physicians to screen appropriately for any other cancers a patient may be at increased risk for. It is also useful for relatives who can then be tested for the familial mutation. Genetic testing provides the ability to not just help one person, but all of their blood relatives across the whole family tree.