MMP9 and urinary bladder cancer: Using two public available GEO datasets, Falzone et al. reported several microRNAs that were associated with the epithelial-mesenchymal transition pathway and NGAL/MMP-9 pathways in bladder cancer [43]; the author also found four microRNAs which were related to colorectal cancer through the mismatch repair pathway and other tumor signaling pathways [44].