Several studies report that the oncogenic miR-17/92 cluster is frequently deregulated in human cancers.28, 29 Analysis of miRNA expression profiles revealed a three-fold increase in miR-17/92 expression in triple-negative breast carcinoma. However, comparison of absolute miRNA levels between normal breast tissue and tumor tissues did not show any significant differences.30 Here, we analyzed TCGA miRNA-seq data set, upregulation of miR-20a was observed in breast cancer, especially in triple-negative subtype.37