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In estrogen receptor-positive breast cancer, progesterone receptor-positive breast cancer and HER2-positive breast cancer, treatment includes medicines that prevent, slow or stop cancer growth by targeting those receptors. But triple-negative breast cancer (TNBC) needs different types of treatments because these cancers are estrogen receptor-negative, progesterone receptor-negative and HER2-negative. Chemotherapy has been shown to be the most effective treatment for TNBC.
About 15 to 20 percent of breast cancers are triple-negative.
Look below for more information from LBBC about triple-negative breast cancer.