When someone is diagnosed with cancer, the concerns that arise are not only about treatment, but also about the risk to their family, especially future children. This often raises an important question: can cancer be inherited, and will a child inevitably develop the same condition?
As public awareness of the role of genetics in disease continues to grow, this question has become increasingly common. Many people feel anxious, even hesitant to make major life decisions such as having children, out of fear of passing on certain health conditions.
One example that drew public attention was the story of Vidi Aldiano, who openly shared his concerns about having children. In a PODHUB podcast with Deddy Corbuzier, along with influencers Juan and Eve, he expressed honestly, “I’m afraid my child might inherit my illness, and I wouldn’t be able to do anything about it.” This reflects a real concern in society, that cancer can be inherited and feels beyond one’s control.
However, it is important to understand that not all cancers are hereditary. In medicine, there is a clear distinction between risk and certainty. A person may have a higher risk due to genetic factors, but that does not mean they will definitely develop cancer. Understanding this difference is key to preventing unnecessary fear and helping us view the relationship between cancer and heredity in a more balanced and informed way.
Understanding Risk vs. Certainty in Cancer
In discussing cancer, it is essential to distinguish between risk and certainty. Risk refers to the likelihood of developing cancer in the future, it is not a guarantee. Factors such as family history, genetics, and lifestyle can increase this likelihood, but not everyone with these factors will develop cancer.
A person can only be definitively diagnosed with cancer through medical confirmation, such as a biopsy. Before that, they can only be described as “at risk,” not “certain” to have the disease.
This distinction is especially important for individuals with a family history of cancer. Having a parent with cancer may increase risk, but it does not mean a child will inevitably develop the same condition. Risk can still be influenced by various factors, including a healthy lifestyle, environment, and early detection. Understanding this concept allows us to interpret health information more wisely without assuming that cancer is inevitable.
Patterns of Genetic Inheritance
Not all cancers are hereditary. According to the National Cancer Institute, only about 5–10% of cancer cases are caused by inherited genetic mutations. This means that the majority of cancers occur due to a combination of environmental and lifestyle factors.
Inherited cancer-related genes often follow an autosomal dominant pattern, meaning that if one parent carries a specific gene mutation, their child has about a 50% chance of inheriting it. Examples include the BRCA1 and BRCA2 genes, which are associated with breast and ovarian cancer.
However, inheriting such mutations does not guarantee cancer development, it only increases the risk compared to individuals without the mutation. This is because cancer development is also influenced by other internal and external factors.
Additionally, many genetic mutations are not inherited but occur during a person’s lifetime due to environmental exposure, aging, or lifestyle factors. The American Cancer Society refers to these as sporadic cancers, which make up the majority of cases. Therefore, even with a family history of cancer, it does not mean all family members will experience the same condition.
The Importance of Genetic Counseling
Genetic counseling is a process that helps individuals understand their cancer risk based on personal and family medical history, guided by a genetics professional. This consultation can take place in person, by phone, or via video, and typically includes discussions about whether genetic testing is necessary, along with its benefits and limitations.
Genetic counselors do not make decisions for patients. Instead, they provide clear information to help individuals make informed choices. They also assist in interpreting genetic test results and offer guidance on appropriate screening or preventive measures.
This process is important because cancer risk is not always certain, and medical knowledge continues to evolve. Through genetic counseling, individuals can better understand their condition and take appropriate steps early on. The results may also help other family members understand their potential risks.
Genetic Testing for Individual Risk Assessment
Genetic testing allows individuals to understand their personal cancer risk, particularly those related to hereditary factors. These tests can detect specific gene mutations even before symptoms appear.
The results can guide next steps, such as earlier screening, preventive strategies, or more personalized treatment approaches (personalized medicine). In addition, this information can be valuable for other family members in understanding their potential risks.
However, it is important to remember that having a gene mutation does not mean a person will definitely develop cancer. Risk is still influenced by lifestyle, environment, and regular health monitoring. Therefore, genetic testing should be conducted with professional guidance.
As part of early detection efforts, KALGen Innolab offers genetic testing services to help identify individual cancer risk. With advanced diagnostic technology and expert support, these tests enable individuals to better understand their health profile and take proactive preventive steps.
Conclusion
Cancer can understandably raise concerns, especially regarding the possibility of being passed on to children. However, having a family history of cancer does not mean a person will inevitably develop the disease.
In medicine, there is a clear distinction between risk and certainty. risk reflects probability, not a definitive diagnosis. While a small percentage of cancers are linked to inherited genetic factors, most result from a combination of lifestyle and environmental influences.
Understanding genetic inheritance patterns, as well as the role of genetic counseling and testing, is essential for assessing risk more accurately. One available option is hereditary genetic testing, such as KALScreen, which analyzes panels of 16 to 69 genes associated with inherited cancer risk.
This type of testing helps identify potential risks early. even before symptoms appear, allowing for more targeted prevention and monitoring strategies.
With the right approach, including genetic counseling, individual risk assessment, and early detection, individuals can take a more proactive role in maintaining their health. Understand your risk early and take the right steps toward a healthier future.
References
National Cancer Institute. (n.d.). Cancer risk and prevention. https://www.cancer.gov/about-cancer/causes-prevention
American Cancer Society. (n.d.). Cancer basics. https://www.cancer.org/cancer/cancer-basics.html
National Cancer Institute. (n.d.). Genetic risk factors for cancer. https://www.cancer.gov/about-cancer/causes-prevention/genetics
Facing Our Risk of Cancer Empowered. (n.d.). Genetic counseling. https://www.facingourrisk.org/info/hereditary-cancer-and-genetic-testing/how-to-get-testing/genetic-counseling
University of Colorado Anschutz Medical Campus. (n.d.). Genetic counseling. https://medschool.cuanschutz.edu/colorado-cancer-center/for-patients-families/genetic-counseling
Saint John’s Cancer Institute. (n.d.). Genetics and genetic counseling. https://www.saintjohnscancer.org/cancer-support/genetics/
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