| | Health disparities in breast cancer
At least five subtypes of breast cancer have been identified on the basis of their patterns of biomarker expression. Triple-negative breast cancer, or TNBC, is defined as breast epithelial cancer cells that lack the HER-2/neu receptor, the estrogen receptor and the progesterone receptor. TNBC patients have a high mortality rate, and, while breast cancer occurs in all races, the rate of TNBC is higher in black women. |  |