“…The categories of specimens included colorectal tissue (2 studies, 15.4%), plasma (7 studies, 53.8%), serum (1 study, 7.7%) and feces (3 studies, 23.1%). Six studies (Ng et al, 2009;Pu et al, 2010;Kalimutho et al, 2011;Kanaan et al, 2012;Wu et al, 2012) evaluated a single microRNA as the diagnostic biomarker, while the other seven studies Koga et al, 2010;Kanaan et al, 2012;Giraldez et al, 2013;Wang et al, 2013a;Wang et al, 2013b) focused on multiple microRNAs for detecting CRC. In total, 23 microRNAs (miR-1, miR-7, miR-15b, miR-17, miR-18a, miR-19a, miR-19b, miR-20a, miR-21, miR-29a, miR-31, miR-92a, miR-92, miR-93, miR-133a, miR-135a, miR-135b, miR-144*, miR-221, miR-375, miR-409-3p, miR-424, miR-760) using as diagnostic biomarkers involved in this meta-analysis.…”