Pathways associated with cell adhesion and cell proliferation, such as focal adhesion and ECM receptor interaction, were positively correlated with miRNA expression, especially in the basal, normal-like, and Luminal B subtypes, whereas pathways associated with cell adhesion molecules were significantly negatively correlated (FDR cutoff 0.05) with miRNA expression in ERBB2, Luminal A, and normal-like breast cancer. This evidence concerns the gene ERBB2 and breast cancer.