LINC00632 and gastric cancer: Up to now, many circRNAs have been identified as diagnostic and prognostic biomarkers in human malignancy, such as colorectal cancer (CiRS-7 and circHIPK3) [21, 34], gastric cancer (circPVT1 and hsa_circ_0000096) [35, 36], hepatocellular carcinoma (circMTO1 and circSMARCA5) [20, 37] and bladder cancer (circMYLK and circITCH) [19, 38].