Triple Negative Breast Cancer Foundation

About Us

What is Triple Negative Breast Cancer

*Triple negative breast cancer (TNBC) is one of many forms of breast cancer.

*Forms of breast cancer are generally diagnosed based on the presence or absence of three “receptors” known to fuel most breast cancer tumors: estrogen, progesterone and HER2‐neu.

*A diagnosis of TNBC means that the tumor in question is estrogen‐receptor negative, progesterone‐receptor negative and Her2‐negative. In other words, triple negative breast cancer tumors do not exhibit any of the three known receptors.
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