Treatment Progress in Triple Negative Breast Cancer

Triple-negative breast cancer (TNBC) lacks expression of the three biomarkers (the estrogen receptor (ER), progesterone receptor (PR), and the human epidermal growth factor receptor 2 (HER2) protein) and are typically higher grade. While the triple-negative clinical phenotype is heterogeneous, the basal-like molecular subtype comprises a large proportion, particularly for breast cancer susceptibility gene 1 ( BRCA1 )-associated breast cancer. New treatment options are checkpoint inhibitors like inhibition of PD-L1 pathway with pembrolizumab and atezolizumab, parp-inhibition with olaparib or talozoparib and treatment with the an antibody drug conjugate sacituzumab-govitecan.