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Cancer

Doctor explains 'triple negative' breast cancer

Q: A good friend of mine in her 50s was just diagnosed with breast cancer. She told me she is "triple negative" and that this is somehow more serious than usual. Can you tell what this means? A: Triple negative breast cancer refers to testing of the cancer cells for sensitivity and response to various hormones. Normal breast growth and development depends on the response of breast cells to the effects of three hormones: estrogen, progesterone and human epidermal growth factor. Estrogen and progesterone are produced in the ovaries and adrenal glands. Estrogen is also produced by fat cells. Growth factor is produced in many tissues of the body. It is the influence of these...

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