DLGAP1 and gastric cancer: The receiver operating characteristic (ROC) curve showed that the area under curve value for DLGAP1-AS2 in the diagnosis of GC was 0.718 (95% CI: 0.577–0.860, P < 0.01) (Fig. 1G), indicating that plasma DLGAP1-AS2 could be a potential predictor for GC diagnosis.