We further studied the association between HER2+ tumor miRNA expression and breast cancer stage in the Molecular Taxonomy of Breast Cancer International Consortium (METABRIC) dataset, where four of the eight miRNAs were expressed (mir-101-5p, miR-29a-3p, miR-29c-3p and miR-744-3p). This evidence concerns the gene ERBB2 and breast carcinoma.