CEACAM5 and colorectal carcinoma: As an example, a set of six miRNAs including miR-21, let-7g, miR-31, miR-92a, miR-181b and miR-203 have been shown to be a reliable biomarker for CRC diagnosis with over 40% specificity and sensitivity compared to classical markers such as the carcinoembryonic antigen (CEA) and CA19-9 [144].