Who Should Get Brca Testing Risk Factors To Know?

BRCA testing looks for harmful mutations in two genes, BRCA1 and BRCA2, that normally help repair damaged DNA. These mutations significantly raise the lifetime risk of breast and ovarian cancer, and they can be passed down from either parent. You should consider BRCA testing if you have a personal or family history of early-onset breast cancer, ovarian cancer, male breast cancer, or Ashkenazi Jewish ancestry, among other specific risk factors. Testing is a personal decision, but knowing your risk factors is the first step in deciding whether genetic counseling and testing are right for you.

What Are BRCA1 and BRCA2 Genes?

Everyone has BRCA1 and BRCA2 genes. They are tumor suppressor genes, meaning they produce proteins that help repair damaged DNA. When these genes work normally, they keep cells from growing out of control.

When a person inherits a harmful mutation in one of these genes, their body is missing a key part of that repair system. Cells are more likely to accumulate DNA damage, which can lead to cancer. This is why people with BRCA mutations have a much higher risk of developing certain cancers, particularly breast and ovarian cancer.

These mutations are inherited in an autosomal dominant pattern. That means if one parent carries the mutation, each child has a 50% chance of inheriting it. A person can inherit the mutation from their mother or their father.

Who Should Get BRCA Testing? Risk Factors To Know

Not everyone needs BRCA testing. The decision is based on specific personal and family history factors. Genetic testing is most useful when the results will change your medical care.

You should consider genetic counseling and testing if you have any of the following risk factors:

• A personal history of breast cancer diagnosed at age 50 or younger.
• A personal history of ovarian cancer at any age.
• A personal history of male breast cancer.
• A personal history of breast cancer with a known BRCA mutation in your family.
• A family history of breast cancer in two or more close relatives on the same side of the family.
• A family history of ovarian cancer in one or more close relatives.
• Ashkenazi Jewish ancestry with a personal or family history of breast or ovarian cancer.
• A relative who already has a known harmful BRCA1 or BRCA2 mutation.

These are the most common indicators. A genetic counselor can help you understand whether your specific family history warrants testing. They can also assess other genetic mutations that may increase cancer risk.

What Cancers Are Linked to BRCA Mutations?

The strongest links are to breast and ovarian cancer. But the risk extends to other types of cancer as well.

For women with a BRCA1 mutation, the lifetime risk of breast cancer is around 60-80%. The lifetime risk of ovarian cancer is around 40-60%. For women with a BRCA2 mutation, the breast cancer risk is similar, but the ovarian cancer risk is lower, around 15-25%.

Men with BRCA2 mutations have an increased risk of breast cancer, prostate cancer, and pancreatic cancer. BRCA1 mutations in men also raise the risk of breast and prostate cancer, but to a lesser degree.

Both mutations are associated with a higher risk of pancreatic cancer and melanoma. The exact risk numbers vary depending on the specific mutation and family history.

How Is BRCA Testing Done?

BRCA testing is a simple blood test or saliva test. A sample is sent to a laboratory that looks for harmful mutations in the BRCA1 and BRCA2 genes.

Before testing, you should meet with a genetic counselor. They review your personal and family medical history to determine if testing is appropriate. They also explain what the results might mean for you and your family members.

The test looks for specific genetic changes. If a harmful mutation is found, your doctor will discuss cancer screening and prevention options. If no mutation is found, it does not mean your cancer risk is zero. It simply means no known harmful mutation was detected in these two genes.

Some tests now look at additional genes linked to hereditary cancer, such as PALB2, CHEK2, and ATM. These are often included in multi-gene panel testing, which may be recommended depending on your history.

What Do the Results Mean?

A positive result means you carry a harmful BRCA1 or BRCA2 mutation. This does not mean you will definitely get cancer. It means your risk is higher than average.

With a positive result, your doctor may recommend more frequent breast screenings, such as MRI and mammogram alternating every six months. Some women choose risk-reducing surgery, such as mastectomy or removal of the ovaries and fallopian tubes. Medications like tamoxifen may also be options to lower breast cancer risk.

A negative result means no harmful mutation was found. This is reassuring, but it does not eliminate your cancer risk. You still need standard cancer screening based on your age and general health.

Sometimes the result is a variant of uncertain significance, or VUS. This means the lab found a genetic change, but scientists do not yet know if it is harmful. A VUS is not treated as a disease-causing mutation. Your doctor will likely recommend screening based on your family history, not the VUS result.

Who Should Not Get BRCA Testing?

BRCA testing is not recommended for everyone. If you have no personal or family history of breast, ovarian, or related cancers, testing is unlikely to provide useful information.

Testing is also not recommended for children. There are no screening or prevention guidelines that apply to childhood for BRCA-related cancers. Testing is typically deferred until adulthood when results can guide medical care.

Some people choose not to test because they do not want to know their risk. That is a valid personal decision. Genetic testing is never mandatory.

Another important point: direct-to-consumer genetic tests are not the same as clinical BRCA testing. Some at-home tests look for only three specific BRCA mutations common in Ashkenazi Jewish populations. A negative result from one of these tests does not rule out other BRCA mutations. If you have a concerning family history, you need comprehensive testing ordered by a healthcare provider.

What Are the Risks of BRCA Testing?

The physical risks are minimal. It is a blood draw or saliva sample. The bigger risks are psychological and social.

Learning you carry a cancer-predisposing mutation can cause anxiety and distress. It also has implications for your family members. Parents, siblings, and children may need to consider their own testing.

There are legal protections. The Genetic Information Nondiscrimination Act, or GINA, prohibits health insurers and employers from discriminating based on genetic information. However, GINA does not cover life insurance, disability insurance, or long-term care insurance. These policies may consider genetic test results.

Before testing, a genetic counselor will discuss these risks with you. This conversation is an important part of the process.

How Much Does BRCA Testing Cost?

Costs vary widely. A single-gene BRCA test can cost several hundred dollars. Multi-gene panels may cost more.

Many insurance plans cover genetic testing when it is medically indicated. This usually means you meet the personal or family history criteria discussed earlier. If you are considering testing, your genetic counselor can help you understand your insurance coverage.

Some testing companies offer financial assistance programs. These may reduce or waive costs based on income.

What to Do Before Getting Tested

Start with genetic counseling. This is not the same as a regular doctor’s visit. A genetic counselor is a healthcare professional with specialized training in medical genetics and counseling.

During the session, the counselor will:

• Review your personal and family health history in detail.
• Assess the likelihood that your family carries a BRCA mutation.
• Explain the benefits, limitations, and risks of testing.
• Discuss what the results might mean for you and your relatives.

This appointment is the place to ask questions. Bring a list of your family members and their cancer diagnoses, if known. The more accurate your family history, the better the risk assessment.

Deciding whether to pursue BRCA testing is personal. The evidence is clear that testing is most valuable for people with specific risk factors. If you are unsure whether you qualify, a genetic counselor is the right person to ask. They can give you a clear picture of your risk and help you make an informed choice.