News sources around the world have increasingly been reporting on medical advances in genetics. The study of DNA continues to bring us closer to achieving the goal of personalized medicine. Healthcare providers are now able to assess risk and determine the best treatments for many diseases based on genetic information. While not every disease or cancer diagnosis is due to genetics, knowing the role of genes can improve the healthcare experience as well as the treatment outcome.
Does cancer run in your family?
Cancer is common. Often, multiple family members within a single family will be affected by cancer and the diagnoses are usually random. There are specific types of cancers that run in families; this can be due to common environmental conditions (sunlight, smoking) or genes passed down in the family.
Only 5-10% of all cancer is hereditary.
Cancer develops randomly about 90-95% of the time. The remaining 5-10% of cancer cases are hereditary, meaning that they are linked to a genetic change passed down within a family. The most common hereditary cancers are breast, colon, prostate, and ovarian cancer. Being aware of your personal and family cancer history as well as knowing the red flags of hereditary cancer are important parts of taking control of your health.
Appropriate genetic testing can inform health care planning and management in order to minimize an individual’s risk of developing cancer. If you are concerned that cancer may run in your family, genetic counseling can be useful to determine if genetic testing is right for you.
We cannot inherit cancer – we can inherit an increased risk.
There are several different genes that can contribute to the development of cancer. When one of these genes isn’t working properly, or is mutated, cells are more likely to grow out of control; this can lead to cancer. These abnormalities, or mutations, can be passed down through generations within a family, causing certain types of cancers to be diagnosed in multiple family members.
Inheriting a genetic mutation in a gene linked to cancer does not guarantee that you will develop cancer. It does, however, substantially increase your risk for certain cancers. To manage this risk, additional screening and/or risk reduction strategies may be suggested.
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