Breast Cancer, the role of genetic tests as a preventative measure

Breast cancer is one of the worst ways cancer can affect someone. It is one of the most common forms of cancers in India as per a survey done by GLOBOCAN. Now here’s an interesting fact. Did you know that around 5-10% of breast cancers are hereditary in nature? That means it is passed on through generations from parent to child. You might wonder then why only certain people encounter breast cancer in their lives, but not the entire generation is affected. That’s the complexity of genes and how they work. Markers that cause cancer to happen can be triggered due to changes in lifestyle, habits, medications and many other factors. While a lot of factors are known nowadays, there are still many causes that are yet to be identified. Here it becomes crucial to understand that one has to toe this fine line very carefully between what’s safe and what’s not.


Keeping all this in consideration, what are the preventative measures that can be taken against breast cancer? Regular self-examinations done in front of a mirror are always great, especially 2-3 days after periods. Checking for changes in the skin tone around the breast and armpit area and for any deformity in the nipples’ shape along with any kind of fluid leaks are the key things to keep in mind. There are a few steps to follow in order to conduct a good physical self-exam. Please refer to the attached image for the same.


Additionally, staying away from alcohol and smoking is a great way to stay safe from triggering any cancer-related markers inadvertently through lifestyle choices. When it comes to physical activity, doing a bit of exercise daily helps in being fit and boosting the immune system. If you are a new mother, it is important to note that breastfeeding is one of the best ways to help prevent the onset of breast cancer. These are all ways in which you can do your bit in staying protected. But disaster doesn’t often come announced. So, what else is an option for you?

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Mammograms are good, but they can only let you know if a tumour has already started developing. There is a way to be proactive even before that. That is through telegenetics. Remember how cancers can be hereditary? If someone among your predecessors ever had a run in with cancer, it is likely that you would be carrying the same marker in your genes. Telegenetics involves a three part process – the initial genetic health consultation, the genetic test and then the explanation of the results and further advice.

In the first part of the process, a genetic counsellor will interact with you to understand your family and your health history. Based on that, you will be advised whether to go for a genetic test or not. Then comes the actual test. This is the simplest part of the process by far. You will be mailed a test kit containing the equipment that will help you provide a sample of your saliva. You can then mail the kit back to the laboratory. After a couple of days, when the test results arrive, your genetic counsellor will start the last part of the process. This includes discussing the test results and letting you know what you should be concerned about and the possible ways in which you can be prepared for any eventuality of breast cancer.

Telegenetics is a better option than just physical checkup because it can be done at almost any age and can let you know if there are any possible risks. Genes do not change with age, so a test done once is good for life. You don’t have to go anywhere to get the test done or to have the counselling and consulting sessions. Counselling and consulting is done via calls or online. Being aware of your genes is a better prerogative than being concerned of any future eventuality without any preparedness. Contact truGeny here https://trugeny.com/ to know more.



Your Genes Matter. Take Charge.




Should Clinicians Recommend Genetic Testing to Family Members of Patients with Breast Cancer History?

For clinicians who care for patients with breast cancer, the possibility of a cancer diagnosis being related to a hereditary predisposition is always a consideration. The potential benefit for identifying a hereditary breast cancer extends beyond the patient to other family members and the risk may not be only for the development of breast cancers, but for other cancers as well. Once a mutation is identified in the patient, each first-degree relative has a 50% risk of carrying the mutation and ideally, it’s crucial that these family members consider genetic testing.
According to a study 1 performed on over 1000 Indian population with breast and ovarian cancer detected mutations in 304 cases (30.1%) with the majority of the mutations were detected in BRCA 1 and BRCA 2 genes (84.9%) compared with non-BRCA genes (15.1%). The study also reported that the high rate of detection of hereditary variants (75%) was observed in patients whose age at diagnosis was below 40 years and had a first degree family member affected by breast or ovarian cancer.
A 2018 lancet study reported that India continues to have a low survival rate for breast cancer – 66 percent 2. And a 2018 Globocan study reported the death rate due to breast cancer in India at 87,090 3. With alarming rates of breast cancer incidence and death rate, the need of the hour is early detection and diagnosis.

genetic testing for family members, genetic testing for breast cancer, genetic testing for breast cancer in india, breast cancer, truGeny

GENETIC TESTING – A SOLUTION FOR CHANGE

  • Limited awareness by the public, complexity of the current structure, restricted genetic counseling services, and current testing pathways have facilitated restricted access and massive under use of genetic testing services 4,6.
  • In fact, the use and importance of genetic testing is growing in the breast cancer space, especially as more targeted and personalized therapies are moving through the pipeline and into the clinic.
  • Genetic testing for cancer genes with expanded panels can cover around 100 genes. It can identify other organs that may be at risk for cancer, such as pancreatic cancer or melanoma. It can also pinpoint others in a family who may harbor mutations.
  • A major advantage of genetic testing is enabling testing in the relatives of breast cancer mutation carriers, to identify unaffected relatives carrying mutations who can benefit from early diagnosis and cancer prevention.
genetic testing for family members, genetic testing for breast cancer, genetic testing for breast cancer in india, breast cancer, truGeny

For example, a recent study performed on 11,836 patients in population-based breast cancer cohorts from US and UK 7 revealed that multigene testing for all patients with breast cancer remained extremely cost-effective compared with testing based on family history or clinical criteria as recommended by US and UK genetic testing guidelines. This study also suggested that one year’s multigene testing on all patient’s with breast cancer could prevent 2101 cases of Breast Cancer and Ovarian cancer and 633 deaths in the United Kingdom and 9733 cases of Breast Cancer and Ovarian cancer and 2406 deaths in the United States. Considering the study results 7, in India, known for its high prevalence, lack of awareness and poor surveillance, multigene testing plays an important role to prevent high incidence and mortality rates. Hence wholesale adoption of multigene panel testing in all women diagnosed with breast cancer may help identify many more patients harboring pathogenic variants, which is important for the patients and their families. While genetic testing improves accuracy of understanding occurrence and recurrence risk, genetic counselling allows individuals to consider the various medical uncertainties, diagnosis, or medical management options based on varied test results; and the risks, benefits, and limitations of genetic testing.

GENETIC COUNSELLING – ITS ROLE OF IMPORTANCE

The growing complexity of genetic testing options, including testing for panels of genes for which less information is available, make pre-test and post-test counselling important components of the process. Genetic counsellors are healthcare providers who are trained in genetics and the psychological effects of learning about inherited risk. Their skills include assessing the patient’s and their family history very thoroughly. They make an estimate of which genes are relevant to test by drawing a family tree, a pedigree, with all the cancers and other diseases in the family. They will explain to the patient the pros and cons of genetic testing and its current limitations.

genetic testing for family members, genetic testing for breast cancer, genetic testing for breast cancer in india, breast cancer, truGeny

Genetic counsellors also help patient’s to inform their family members and reach out to relatives, and guide them through appropriate testing. Genetic counsellors not only offer support and guidance to patients and families, but also become a bridge between the patient and the doctor. At truGeny, our certified genetic counsellors will help translate genetic information into clinical practice while navigating the psychological, ethical and legal pitfalls. To ensure access to quality genetic services for all individuals, truGeny offers genetic counselling services via tele-genetic sessions with a vision to improve patient’s access to health care in areas with geographical barriers, reducing the cost burden and saving time.

References

  1. Singh, J., Thota, N., Singh, S., Padhi, S., Mohan, P., Deshwal, S. & Ahmed, R. (2018). Screening of over 1000 Indian patients with breast and/or ovarian cancer with a multi-gene panel: prevalence of BRCA1/2 and non-BRCA mutations.
    Breast cancer research and treatment, 170(1), 189-196.
  2. Allemani, C., Matsuda, T., Di Carlo, V., Harewood, R., Matz, M., Nikšić, M., … & Ogunbiyi, O. J. (2018). Global surveillance of trends in cancer survival 2000–14 (CONCORD-3): analysis of individual records for 37 513 025 patients
    diagnosed with one of 18 cancers from 322 population-based registries in 71 countries. The Lancet, 391(10125), 1023-1075.
  3. Bray, F., Ferlay, J., Soerjomataram, I., Siegel, R. L., Torre, L. A., & Jemal, A. (2018). Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA: a cancer journal for clinicians, 68(6), 394-424.
  4. Childers CP, Childers KK, Maggard Gibbons M, Macinko J. National estimates of genetic testing in women with a history of breast or ovarian cancer. J Clin Oncol. 2017;35(34):3800-3806. doi:10.1200/ JCO.2017.73.6314
  5. Manchanda R, Blyuss O, Gaba F, et al. Current detection rates and time to detection of all identifiable BRCA carriers in the Greater London population.J Med Genet. 2018;55(8):538-545. doi:10.1136/jmedgenet-2017-105195
  6. Hughes KS. Genetic testing: what problem are we trying to solve? J Clin Oncol. 2017;35(34):3789- 3791. doi:10.1200/JCO.2017.74.7899
  7. Sun, L., Brentnall, A., Patel, S., Buist, D. S., Bowles, E. J., Evans, D. G. R. & Duffy, S. (2019). A Cost-effectiveness Analysis of Multigene Testing for All Patients with Breast Cancer. JAMA oncology.