There's still no cure for breast cancer that has spread to distant parts of the body. However, treatment can help prolong and improve quality of life in people with MBC.

What is triple-negative breast cancer? Triple-negative breast cancer is that which tests negative for three receptors: estrogen, progesterone, and human epidermal growth factor receptor 2 (HER2). It is also the least common form of breast cancer and the hardest to treat.