Is estrogen receptor negative breast cancer risk associated with a fast life history strategy? - Er negative breast
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Hormone Receptor-Positive Breast Cancer. About 80% of all breast cancers are “ER-positive.” That means the cancer cells grow in response to the hormone estrogen. If your breast cancer has a significant number of receptors for either estrogen or progesterone, it’s considered. This kind of treatment is helpful for hormone receptor-positive breast cancers, but it doesn't work on tumors that are hormone receptor-negative (both ER- and.