OncomiRs like let-7 and miR-21 are deregulated in two types of benign tumors: Fibroadenoma and Fibroadenomatosis

In this study we have preformed miRNA and mRNA expression profiling of benign breast tumors, breast cancers, and normal breast tissue. We have identified cancer-related miRNAs in benign tumors, with their deregulation similar to that in cancer tissue. In addition we have performed miRNA-mRNA correlation studies.