precision medicine
How a Hereditary Cancer Screening Test Can Reveal Your Genetic Risk
Dr. Marcus Webb
Head of Pharmacogenomics Research
April 30, 20265 min read
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How a Hereditary Cancer Screening Test Can Reveal Your Genetic Risk
What Is a Hereditary Cancer Screening Test?
A hereditary cancer screening test is a DNA test that checks for harmful mutations in genes known to increase the risk of developing certain cancers. These mutations are passed down through families. Unlike a tumor biopsy, which looks at cancer cells, this test examines your germline DNA, the genetic blueprint you were born with. It can identify mutations even if you have never had cancer. Most tests use a blood or saliva sample. The lab sequences specific genes that are linked to hereditary cancer syndromes. The results categorize mutations as positive, negative, or a variant of unknown significance. A positive result means you carry a mutation that raises your cancer risk. A negative result usually means the common hereditary mutations are not present, though it does not rule out all genetic causes. Oncogenetic screening like this is not the same as routine cancer screening (mammograms, colonoscopies). Genetic testing tells you about your baseline risk; the other tests look for early signs of cancer. Both are important, but they serve different purposes.Who Should Consider a Genetic Cancer Risk Test?
Not everyone needs a genetic cancer risk test. The strongest candidates are people with a personal or family history that suggests an inherited syndrome. Indicators include:- Cancer diagnosed at an unusually young age (e.g., breast cancer before age 50, colorectal cancer before age 50)
- Multiple family members on the same side of the family with the same type of cancer
- An individual with more than one primary cancer (e.g., bilateral breast cancer, breast and ovarian cancer)
- Specific cancer types that are strongly linked to heredity, such as triple-negative breast cancer, male breast cancer, or pancreatic cancer
- A known mutation in the family (e.g., a BRCA mutation in a parent or sibling)
- Ashkenazi Jewish ancestry, which carries a higher incidence of certain BRCA mutations
The GeneMatrix AI Hereditary Cancer Panel
GeneMatrix AI’s hereditary cancer panel (GeneCancer) covers 108 genes associated with the most common hereditary cancer syndromes. This includes full sequencing of BRCA1 and BRCA2 for hereditary breast and ovarian cancer, as well as MLH1, MSH2, MSH6, PMS2, and EPCAM for Lynch syndrome. Other genes covered include TP53 (Li-Fraumeni syndrome), CDH1 (hereditary diffuse gastric cancer), PTEN (Cowden syndrome), and many more.
What Do Positive Results Mean?
A positive result does not mean you will definitely get cancer. It means your risk is elevated compared to the general population. The exact increase depends on the gene and the specific mutation. For example, a BRCA1 mutation gives a 55 to 72 percent lifetime risk of breast cancer, compared to about 12 percent in the general population. For Lynch syndrome, the lifetime risk of colorectal cancer can be as high as 80 percent without surveillance. After a positive result, the next step is cancer genetic counseling, either through your own provider or through a service offered by GeneMatrix. A counselor will explain the specific risks, discuss screening options (like earlier or more frequent mammograms, colonoscopies, or MRI), and talk about preventive measures such as risk-reducing surgery or medication.
Hereditary Cancer Syndromes at a Glance
| Syndrome | Main Genes | Associated Cancers | Estimated Prevalence |
|---|---|---|---|
| Hereditary Breast and Ovarian Cancer (HBOC) | BRCA1, BRCA2 | Breast, ovarian, pancreatic, prostate, male breast | 1 in 400 |
| Lynch Syndrome | MLH1, MSH2, MSH6, PMS2, EPCAM | Colorectal, endometrial, ovarian, stomach, small bowel | 1 in 279 |
| Li-Fraumeni Syndrome | TP53 | Breast, sarcoma, brain, adrenal, leukemia | 1 in 5,000 – 20,000 |
| Familial Adenomatous Polyposis (FAP) | APC | Colorectal, duodenal, thyroid, gastric | 1 in 10,000 |
| Peutz-Jeghers Syndrome | STK11 | Colorectal, breast, pancreatic, ovarian, stomach | 1 in 50,000 – 200,000 |
How Is Hereditary Cancer Screening Different from Regular Cancer Screening?
Regular cancer screening, like mammography, colonoscopy, or Pap smears, looks for cancer that already exists or early precancerous changes. These tests are critical for early detection. But they do not tell you if you are genetically predisposed to cancer in the first place. A cancer susceptibility gene test does exactly that. Genetic testing is typically done once in a lifetime (unless new genes are added to the panel or new mutations are discovered). It can be ordered at any age, but most guidelines recommend testing after age 18 for adult-onset cancers. The results can guide which routine screenings you need, how often, and at what age to start them.
Frequently Asked Questions
How much does a hereditary cancer screening test cost?
The GeneMatrix AI hereditary cancer panel (GeneCancer) is available through a subscription starting at $69 per month. That subscription includes the full 108-gene panel, results within 5–7 days, and access to a genetic counselor. There are no hidden fees for the test kit or shipping.Do I need a doctor’s order to get the test?
No. GeneMatrix AI offers direct-to-consumer ordering for the hereditary cancer screening test. You can purchase the kit online without a referral. However, GeneMatrix strongly recommends that you discuss your results with a qualified healthcare provider or genetic counselor to make informed decisions about your health.Can the test tell me I will not get cancer?
No genetic test can guarantee you will never develop cancer. A negative result means no pathogenic mutations were found in the genes tested, but it does not rule out all hereditary causes or environmental factors. For most people, a negative result reduces the estimated risk to the general population level, but healthy lifestyle and regular screening remain important.How long does it take to get results?
After your saliva sample arrives at the GeneMatrix CLIA-certified lab, results are typically delivered in 5 to 7 days. You will receive a secure link to your digital report, which includes a plain-language explanation of your findings.What if my result shows a variant of unknown significance (VUS)?
A VUS means the lab found a genetic change that has not yet been classified as harmful or benign. Most VUSs are later reclassified as harmless. GeneMatrix monitors updates to clinical databases and will notify you if the classification changes. A genetic counselor can help you understand how to interpret a VUS in the context of your family history.Take the Next Step
A hereditary cancer screening test is not a crystal ball, but it is one of the most powerful tools available for understanding your personal cancer risk. If you have a family history that raises questions, or if you simply want the peace of mind that comes from knowing, GeneMatrix AI makes the process simple, fast, and affordable. Start by visiting the hereditary cancer genetic testing Chicago page to learn more about the GeneCancer panel. If you have specific questions, the frequently asked questions section covers testing logistics, privacy, and follow-up care. For those ready to order, the DNA testing subscription plans offer a clear path forward. A 2023 study in the Journal of Clinical Oncology found that 12% of individuals who met testing criteria but had no prior genetic test chose to pursue cascade testing after a family member received results from a panel similar to GeneMatrix's. Knowing your genetic risk can shift that number and drive earlier intervention for entire families.Dr. Marcus Webb
Head of Pharmacogenomics Research
Expert contributor at Gene Matrix AI, dedicated to advancing precision medicine through evidence-based genetic insights and clinical research.
