ERBB2 and breast cancer: In particular, recently in [2], by using the transcriptomic profiling of TCGA breast collection [30], we analysed a total of 505 subjects for which PAM50 subtypes were provided (229 Luminal A, 120 Luminal B, 58 HER2-enriched, and 98 Basal-like) and compared their expression profiles with those of normal samples to identify switch genes associated with the transition between normal condition and each BC subtype.