SARASOTA (July 9, 2013) – In May, superstar Angelina Jolie revealed she had both breasts removed because genetic testing showed she had a high risk for cancer. Every day, more and more people face similar decisions as genetic tests to assess the risk of breast, colon and ovarian cancer become more reliable, accessible and affordable.
With last month's decision by the US Supreme Court to ban patents on human genes that restrict testing options, the genetic-testing industry is growing rapidly and the Internet is filled with advertisements urging people to learn about their genetic makeup.
But for that very reason, experts say proceed with caution if considering at-home tests or unregulated testing providers and laboratories. While the industry is expanding exponentially, the tests remain poorly standardized and largely unregulated (none are FDA-approved), said James Fiorica, MD, medical director of Sarasota Memorial's Women's Cancer Services and Genetic Education Program.
“My biggest concern is that people will make important life decisions based on simplified kits or tests that provide bare snippets of information,” he said. “Many of the direct-to-consumer tests today look only at common markers – just bits and pieces – rather than all of the variations in a gene.
“At best, they leave people with a confusing array of results that can be challenging to interpret without additional input from a doctor or trained genetic counselor," he added. At worst, he said, they may report a negative result that gives people a false sense of security. "None provide the comprehensive testing or education needed to properly manage an individual or family health concern.”
For those truly concerned about a hereditary cancer or future disease, Dr. Fiorica recommends meeting with a board certified genetic counselor to fully understand the scientific, emotional and ethical factors surrounding genetic testing.
The Commission on Cancer recommends genetic testing be performed only by board certified genetic counselors – professionals with graduate education, specialized training and board certification in genetics. Providers trained by labs marketing specific tests may not be fully informed and order the wrong test or misinterpret results. Individuals may also experience an invasion of genetic privacy if testing companies use their genetic information in an unauthorized way, said Board Certified Genetic Counselor Cathy McCann, MS, CGC, coordinator of Sarasota Memorial’s Genetic Education Program.
"Genetic testing is not right for everyone - often there are good reasons to not have genetic testing, or to have some genetic tests but not others,” McCann said. “Communication is a big part of guiding a patient with an elevated risk of developing a genetic disease. As genetic counselors, we are trained to track the latest discoveries and explain both the benefits and risks so individuals have the information they need to make the wisest decisions for themselves and their families.”
Reasons to seek evaluation include:
A Board Certified Genetic Counselor trained in cancer assessment will:
Genetic Counseling Information
If you are concerned about a hereditary risk of cancer, call Sarasota Memorial’s Genetic Education Program – the only hospital-based genetic education and testing program in the region. Program coordinator and Board Certified Genetic Counselor Cathleen McCann, MS, CGC, provides genetic counseling and testing services for breast, ovarian, colon, pancreatic, prostate, melanoma and other cancer syndromes. Call (941) 917-2005 or visit our Hereditary Cancer / Genetic Testing & Counseling page for more information
About Cathleen McCann
Board Certified Genetic Counselor, Sarasota Memorial Institute for Cancer Care
Cathleen McCann earned Bachelor’s degrees in Psychology, Natural Science & Mathematics and Zoology/Physiology from the University of Wyoming. She received a Master’s degree in Human Medical Genetics at the University of Wisconsin. She is Board Certified as a Diplomat of the American Board of Genetic Counseling and the American College of Medical Genetics. She also is a member of the National Society of Genetic Counselors. She joined the leadership team at Sarasota Memorial’s Genetic Education Program in May 2013. Previously, she provided services at the University of Arizona Cancer Center- Phoenix, Harvard Medical Associates, Inova Health System, and other leading medical centers. Most recently, she was a genetic professor for the Maricopa College system in Phoenix for five years, as well as the University of Arizona Medical School.