The TCGA-BC dataset is composed of 989 biopsy samples each associated with RNA-Seq, miRNA, and methylation probe data from primary solid breast cancer tumors that have been annotated according to the PAM50 subtype signature into one of four subtypes: Luminal A (LumA), Luminal B (LumB), HER2-enriched (HER2) and Basal-like (Basal) (Parker et al. 2009). This evidence concerns the gene ERBB2 and breast cancer.