Is genome testing required for a woman with breast cancer?

Question

Hello doctor,

I am a 46-year-old woman who was recently diagnosed with early-stage breast cancer. My oncologist mentioned cancer genome testing to help decide if I need chemotherapy or only hormone therapy. I have a few concerns, like:

How do these genetic tests work?
Do they analyze my tumor or my own DNA?
Are they accurate in predicting the risk of the cancer coming back? I am also worried about privacy.
Can insurance companies or employers access these genetic results?

The test is quite expensive, so I want to be sure it is worth doing. Please help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

It is completely understandable to feel anxious and uncertain about these decisions, especially when you are facing something as overwhelming as a new breast cancer (a disease in which cells in the breast grow abnormally and form a tumor that can spread if not treated). Cancer genome testing may sound complicated, but it is designed to personalize your treatment and help avoid therapies that may not be necessary.

These tests usually analyze the genetic makeup of your tumor tissue. This means they study the genes inside the cancer cells, not the DNA you inherited from your parents. The goal is to see how active certain cancer-related genes are. The results help doctors estimate the chance of recurrence, which means the risk of the cancer returning after your first treatment. If the test shows a low risk of recurrence, you may be able to avoid chemotherapy and use hormone therapy instead.

Hormone therapy (treatment that blocks the effect of estrogen on cancer cells) usually has fewer side effects. If the test shows a higher risk, chemotherapy (strong medicines that kill fast-growing cells) may offer more benefit.

These tests, such as Oncotype DX and MammaPrint, are supported by large clinical studies and are generally reliable. However, no test can predict the future with complete certainty. Doctors use the results along with other information, such as your cancer stage (how advanced the cancer is), tumor size, and your personal health history.

In terms of privacy, your genetic test results are protected under strict medical confidentiality laws. In most countries, employers or insurance companies cannot legally access or use these results for discrimination. It is still a good idea to ask your doctor or the testing center how your data will be stored and who is allowed to view it.

Although cancer genome testing can be expensive, many patients feel it is worthwhile because it can help avoid unnecessary chemotherapy and the emotional and physical strain that comes with it. You are making a thoughtful and informed decision by asking these questions. Take your time, talk with your oncologist, and choose the plan that feels right for your health and peace of mind.

I hope this helps you.

Kindly revert if there are any queries.

Thank you