PTEN and colorectal carcinoma: MiR-21, miR-200a, miR-543, miR-32, miR92a, miR-26a, miR-1061, and miR-181a act as oncogenes downregulating the oncosuppressor PTEN (phosphatase and tensin homolog), which is a diagnostic factor for CRC patients, therefore representing potential targets for CRC therapy [54].