Oncology & Cancer

9 common questions about genetic testing for cancer

Your genes play a role in nearly all areas of your health. A gene is like an instruction manual for your body that tells your body how to function, develop and stay healthy. People have about 20,000 genes in their bodies.

Oncology & Cancer

Q and A: What is the benefit of visiting a genetic counselor?

DEAR MAYO CLINIC: My grandmother and mother, as well as an aunt and a cousin, have had breast cancer. Another cousin was diagnosed with colon cancer recently. It has been suggested that I undergo genetic counseling to determine ...

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