Interestingly, some polymorphisms located at the 3' untranslated region (UTR) of IL28B, e.g. rs 4803217, seem to interfere with the binding of miRNA, to date recognized as important post-transcriptional regulators. In the last years miRNAs acquired a growing relevance as potential biomarkers for several diseases including cancer, and many researches are focusing on understanding their role in cancer.