If you saw a patient who was under 50 and had breast, colon, or ovarian cancer, what course of action would you recommend? What if the patient was a woman with more than 1 type of cancer, or a man with both colon and bladder cancers? If your response would be to refer those patients for genetic counseling, you would be doing the right thing, according to experts in that field.
Armed with new insights about germline mutations—which are inherited and present in every cell of the body—genetic counselors are not only able to identify familial cancers, including Lynch syndrome and Hereditary Breast-Ovarian Cancer syndrome, but they can also suggest appropriate interventions. Their ability to reach patients would be limited, though, without support from oncology nurses— often the first healthcare providers to gather and review detailed personal and family cancer histories.
That’s why experts are calling on oncology nurses to be knowledgeable about familial cancers, and to help ensure that they are diagnosed.
Rebecca Nagy, MS, CGC
“Genetics has become a standard of care in cancer patients,” said Rebecca Nagy, MS, CGC, a certified genetic counselor at the Ohio State University Comprehensive Cancer Center and president-elect of the National Society of Genetic Counselors (NSGC). “It used to be that this process would tell you if you were at risk but wouldn’t change treatment, but now we’re getting into an area where these changes in genes are tailoring what therapy we give to patients. It’s such an evolving field and staying up to speed will help oncology nurses and make them better at their jobs.”
A position statement by the Oncology Nursing Society (ONS) (www.goo.gl/eyZzA) echoes that idea. According to the statement, there is a growing need for “professional nurses trained in genetics and genomics and cancer care,” and those areas should be included in all nursing curricula. In fact, continuing education courses focused solely on genetics and genomics should be available, ONS said in the statement, which also emphasizes the importance of collaborative relationships between healthcare providers and “specialty organizations with a focus in genetics.”
Before assessing their own role in genetic counseling, it is first important for nurses to understand the function of the genetic counselor. A certified genetic counselor is a professional who has completed a 2-year master of science degree focused on the study of both genetics and counseling, and then earned certification from the American Board of Genetic Counseling (www.goo.gl/9ukjv). Genetic counselors who specialize in oncology evaluate family histories of cancer and determine whether patients or their relatives should be tested for gene mutations that can cause hereditary oncologic syndromes, and which tests they should have. After interpreting the results of those blood tests, the counselors help patients make decisions about prevention or management of their cancers, and also offer psychosocial support.
The information the counselors provide can make an enormous difference in quality of life and longevity for patients, including some with cancer and some being followed by oncologists because their family histories make cancer likely. Most commonly, genetic counselors who specialize in oncology investigate the possibility of hereditary breast, colon, ovarian and/or uterine cancers, Nagy said.
“The conditions we test for are called syndromes because the patients are at risk for a group of cancers, so we test them to see if they’re at risk for other cancers down the road,” Nagy said. “If we find they’re a carrier of a change in a gene, we test their family members before the cancer occurs and do things to lower their risk, like early screening. Some women or men will have surgery, or take medications, before the cancer develops, to lower their risk.”
Ellen T. Matloff, MS, CGC
When genetic screening yields a positive result for a mutation or syndrome, various intervention options are available (Table Below). Preventive surgical options can include mastectomy in women who carry a breast cancer mutation, removal of the thyroid gland in children likely to develop an aggressive form of thyroid cancer, or removal of the colon in people with a mutation that can cause colon cancer. Less invasive interventions can include dietary changes.
In patients who already have cancer, “It can be crucial to know whether the condition is caused by a [genetic] syndrome before deciding on a treatment,” added Ellen T. Matloff, MS, CGC, a certified genetic counselor and director of cancer genetic counseling at Yale Cancer Center.
“If a woman has breast cancer caused by a TP53 mutation and opts for radiation, she is actually at very high risk to develop a brand-new cancer in the field of her radiation,” Matloff said. “We’ve seen, too late, some women who were diagnosed with early-stage breast cancer, chose lumpectomy and radiation, and then developed bone cancer that killed them.”
Likewise, it’s helpful to know when a BRCA1 or BRCA2 mutation is driving a woman’s breast cancer, because tumors with mutations in those genes may be more sensitive to PARP inhibitors than to cytotoxic drugs, Nagy said.
So what is the role of oncology nurses in this process? Depending on their level of training, oncology nurses will have varying levels of involvement in genetic counseling. Many nurses play a facilitator role— recognizing an individual’s need for genetic evaluation and then making a referral to a counselor; however, according to ONS’s position statement on genetic counseling, some advanced practice nurses participate in the actual counseling: “Advanced practice nurses with specialized training in clinical cancer genetics and genomics and cancer predisposition testing may be involved in the clinical application of cancer genetics, including genetic counseling and education.”
As previously discussed, genetic counseling in cancer care involves diagnosing and managing hereditary oncologic syndromes. The role of most nurses in this process is a matter of asking a patient about the history of cancer in his or her family, recognizing indicators that suggest the need for genetic counseling, and making a referral. It is an opportunity for nurses to fill a potential gap in care, Matloff said, since that information is “not typically covered in a 20-minute visit with an oncology physician.”
|Syndrome Name||Genes Responsible||Major Tumors/Cancers||Interventions|
|Cowden Syndrome||PTEN||Breast, thyroid, uterine; other benign tumors of various organs||Increased screening for all cancer/tumor typesa|
|Familial Adenomatous Polyposis and MutYH-Associated Polyposis||APC, MutYH||Colon cancer and polyps; small intestinal cancer||Prophylactic removal of colon, increased screening for other cancers|
|Familial Paraganglioma Syndrome||SDHB, SDHC, SDHD||Paragangliomas of head, neck, and abdomen||Increased screening for paragangliomas|
|Hereditary Breast-Ovarian Cancer Syndrome||BRCA1, BRCA2||Breast and ovarian cancer; prostate cancer in males; some other cancers slightly elevated||Increased breast screening, chemoprevention, and/ or mastectomy; prophylactic removal of ovaries/ fallopian tubes|
|Lynch Syndrome||MLH1, MSH2, MSH6, PMS2||Colon and uterine cancer; other cancers such as stomach, ovarian, urinary tract||Increased colon cancer screening and chemoprevention; prophylactic removal of uterus/ ovaries; screening for other cancers|
|Juvenile Polyposis Syndrome||MADH4 (aka SMAD4), BMPR1A||Gastrointestinal cancers, benign colon polyps||Increased screening for colon and small intestinal cancers|
|Li-Fraumeni Syndrome||TP53||Breast, brain, lung cancer, leukemia||Increased screening for breast cancer; consider research-based imaging for other cancers|
|Multiple Endocrine Neoplasia type 1||MEN1||Pancreatic cancer (neuroendocrine); pituitary and parathyroid tumors||Increased screening for pancreatic and other tumors|
|Multiple Endocrine Neoplasia type 2||RET||Medullary thyroid cancer; adrenal and parathyroid tumors||Prophylactic removal of thyroid; increased screening for other tumors|
|Peutz-Jeghers Syndrome||LKB1 (aka STK11)||Gastrointestinal, breast cancer||Increased screening for colon, small intestinal, and breast cancer|
|Von Hippel-Lindau Syndrome||VHL||Renal cell carcinoma, brain cancer (hemangioblastoma), other benign tumors||Increased screening for all cancers/tumors|
According to Nagy and Matloff, specific redflag symptoms oncology nurses should look for include 2 or more close relatives with breast and/ or ovarian cancer, especially if 1 was aged <50 years at diagnosis; a woman with both breast and ovarian cancers; triple-negative breast cancer in a family; a family that includes a man diagnosed with breast cancer; Jewish ancestry combined with other potential indicators of Hereditary Breast-Ovarian Cancer syndrome; incidences of both uterine and colon cancers in a person or family; and any cancers that have occurred in every generation of a family.
Being truly familiar with the clues that point to a hereditary cancer should also mean that a nurse knows when not to refer a patient to a genetic counselor, Nagy said. After all, Matloff pointed out, the majority of people who develop cancer do not have hereditary forms of the disease.
“Among 100 women with breast cancer, 5 to 10 of them will have a hereditary form, and that’s what we’re looking for,” Nagy said. “That’s why it’s important that the person caring for a patient knows those red flags. Currently, genetic counseling and testing is most beneficial for those 5 to 10 high-risk patients, not all 100 women.”
While Matloff urges oncology nurses to seek a 4-generation family history from patients who show signs of having hereditary cancers, Nagy acknowledges that many nurses may not have time to investigate at that level.
“If you’re working in a busy oncology clinic and you need to know whether to refer,” Nagy said, “ask the patient if his first- or second-degree relatives had cancer, which of them had it, which type, and how old they were when they were diagnosed. First-degree relatives are parents, siblings or offspring, and second-degree relatives are aunts, uncles, nieces, nephews and grandparents, on both sides of the family.”
It is important to note as well that diagnosis of familial cancers can also affect reproductive decisions, said Jackie Hale, RN, APN, AOCN®, an advanced practice registered nurse and advanced oncology certified nurse who is credentialed in genetics and coordinates the Family Risk Assessment Program at Hunterdon Regional Cancer Center in Flemington, New Jersey.
“If we are suggesting that, for medical management, a woman could benefit from having her ovaries removed to reduce her risk, having that decision made in the context of whether or not her family is complete can be very important,” Hale said.
Jackie Hale, RN, APN, AOCN®
“It is imperative that oncology nurses who are doing genetic testing have the background and the preparation for it,” Hale said. “I believe that it takes more than a cursory 1- to 2-hour continuing medical education program.”
While many medical practices have easy access to genetic testing kits—particularly tests for the BRCA1 and BRCA2 breast and ovarian cancer genes, and for mutations that cause hereditary colon cancer— overseeing the genetic counseling process without a solid education in that area can lead to inadequate screening or unnecessary surgeries, Nagy said.
“A lot of harm can come from not seeing a healthcare professional with adequate training,” said Nagy. “We see patients who have had no counseling whatsoever and think they have cancer because a genetic test came back positive, or they’ve had the wrong surgery or the wrong type of screening because of misinterpretation of [the implications of] test results. I worry about patients who have bad family histories but normal test results, and their doctors are falsely reassuring them that everything is fine. They don’t get in to see us, but they still might have some risk, or maybe another gene we could test for. It’s something we actually try to counter a bit by offering physicians and nurses in our community some education. If they have a question about a patient, they can just give us a call. Or, if they want more education, we’ll come and do grand rounds.”
It is important for oncology nurses to understand that beyond medical assessment, genetic counseling also involves protecting patients from some of the social and financial repercussions of carrying a hereditary cancer gene.
“Health insurance will most likely cover genetic testing, and while many patients worry about genetic discrimination by employers and health insurers, they are protected under the Genetic Insurance Nondiscrimination Act (GINA),” Matloff said. “However, that does not protect them from discrimination by life or disability insurance companies, so before testing we ask if they need any more life or disability insurance. If people are not counseled that way, they can lose those opportunities. They need to have a really clear understanding of the risks and benefits of genetic testing.”
Another issue nurses should be prepared to address is helping individuals overcome barriers to access. While nurses may recognize the value in referring patients to genetic counselors, connecting the patient with a genetics expert can be difficult.
“There are very few nurses who are certified in genetics, and there are a limited number of genetic counselors available, so there are portions of the country where people would have to travel to get genetic services,” Hale said.
In those cases, Matloff suggested, nurses can visit the NSGC’s website (www.nsgc.org) to find a genetic counselor in their area. In addition, she said, there are several websites—most affiliated with health insurance companies—that offer consultations with genetic counselors by phone. One example, she said, is a site offered by InformedDNA (www.informeddna.com).
Seeking that help is definitely worth the effort, Hale said. “In the 12 years I’ve been doing this, I have never met a family for whom the answer was simple because it was just another test result. The answer always impacts other people. It impacts their medical management, their emotional state and their anxiety, and I believe that to do the test outside the context of support and counseling creates a void in our delivery of care.”
For eligible registered nurses who want to gain expertise in the field, the Genetic Nursing Credentialing Commission (www.geneticnurse.org) offers both a Genetics Clinical Nurse (GCN) certification and an Advanced Practice Nurse in Genetics (APNG) certification.
Also available are a variety of continuing education courses, including a Cancer Genetics 101 online course offered by ONS (www.goo.gl/5Df6I); a course offered by Fox Chase Cancer Center, titled “Bridging Genomic Science and Practice: Cancer Risk Assessment, Treatment and Beyond (www.goo.gl/B5HkQ)”; an Intensive Course in Cancer Risk Assessment offered by City of Hope (www.goo.gl/tNjXs); and information and resources from the International Society of Nurses in Genetics (www.isong.org).