The power of genetic testing to aid in cancer prevention is amplified with cascade testing. Once an individual is identified as having hereditary cancer, our genetic counselors work with the patient and his or her family to identify other family members with the same genetic mutation. Most, but not all, of the genetic mutations related to hereditary cancer are passed down at a rate of 50 percent. Having a genetic mutation does not mean the individual will definitely develop cancer. It simply indicates an increased risk. Many of the gene mutations we find in our patients raise their risk for cancer to greater than 50 percent in their lifetime. All patients with a genetic mutation are given a personalized letter with information for their family members.
