By analyzing gene expression profiles from 21 breast cancer data sets and 587 TNBC cases, Lehmann et al.37 identified 6 distinct TNBC subtypes, including 2 basal-like (BL1 and BL2), an immunomodulatory (IM), a mesenchymal (M), a mesenchymal stem-like (MSL), and a luminal androgen receptor (LAR) subtype. This evidence concerns the gene AR and breast cancer.