Should my family get genetic testing if I have Lymphoma

Genetic Testing for Your Family: What You Should Know

This is an important question, and the answer depends on understanding the difference between two types of genetic testing—which can be confusing because they sound similar but mean very different things.

Two Different Types of Genetic Testing

Genetic testing for inherited mutations (what your family might consider):

• Looks for mutations you may have inherited from your biological parents
• Checks if your family members carry the same inherited genetic changes
• Relevant for certain hereditary cancer syndromes

Mutation testing of your lymphoma cells (what your doctors do):

• Examines the cancer cells themselves, not your inherited genes
• Looks for mutations that developed in the tumor, not ones you were born with
• Used to guide your treatment options

According to the NCCN Guidelines for Patients: Marginal Zone Lymphomas, this distinction is important: "Mutation testing includes tests of genes or their products (proteins)... This is separate from the genetic testing for mutations that you may have inherited from your biological parents."

Should Your Family Get Tested?

In most cases, the answer is NO—for these reasons:

Most lymphomas are not hereditary. They develop due to mutations that happen in the cancer cells themselves over time, not because of inherited genetic changes passed down through families. Your family members don't inherit your lymphoma or the mutations in your cancer cells.

However, there are rare exceptions:

• Some families have inherited syndromes that increase lymphoma risk (like Lynch syndrome or Li-Fraumeni syndrome)
• Your oncology team would have identified this during your evaluation if it applied to you

What You Should Do

Ask your care team these specific questions:

1. "Based on my diagnosis and family history, do I have a hereditary cancer syndrome that would affect my family members?"

2. "Should any of my blood relatives be referred for genetic counseling?"

3. "Are there any inherited genetic mutations in my family that we should know about?"

4. "What screening or preventive measures should my family consider?"

Your oncologist and genetic counselor (if you have one) are the best resources to evaluate your specific situation, including your personal and family medical history, to determine if hereditary testing is appropriate for your relatives.

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This information is for educational purposes only. Always consult your healthcare team for personalized medical advice and decisions.