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How is triple-negative breast cancer identified through testing?

Your breast cancer subtype is determined through laboratory testing of tissue samples taken during a biopsy. When you have a biopsy, a doctor removes a small sample of tissue using a needle. This sample goes to a laboratory where a pathologist runs specific Show Full Answer

How is triple-negative breast cancer identified through testing?

Your breast cancer subtype is determined through laboratory testing of tissue samples taken during a biopsy. When you have a biopsy, a doctor removes a small sample of tissue using a needle. This sample goes to a laboratory where a pathologist runs specific tests on the cancer cells.

The tests look for three key proteins:
- Estrogen receptor (ER)
- Progesterone receptor (PR)
- Human epidermal growth factor receptor 2 (HER2)

If your cancer cells test negative for all three of these proteins, you have triple-negative breast cancer. If any of these proteins are present, your cancer is classified differently and may respond to hormone therapies or targeted treatments.

Your pathology report will show these test results along with information about your cancer's type, grade, and stage. This information helps your doctor determine which treatments are most likely to work for you.

If you'd like to share your diagnosis picture or discuss what your specific results mean, that might help provide more personalized guidance about understanding your subtype.

 AI-generated responses are not a substitute for medical advice. These services are not intended to diagnose, treat, or cure any condition or disease. Always ask your doctor about specific health concerns.

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