The third cluster, characterized by high expression of an immune response gene module and lymphocyte infiltration, is associated with better outcome among patients with TNBC [11,12], while the fourth and last cluster, characterized by androgen receptor (AR), forkhead box protein A1 (FOXA1) and ERBB4 expression and signaling, share common gene profile with ER-positive breast cancer [13]. This evidence concerns the gene AR and breast cancer.