Figure 1: Comparison of levels of miR-21 in samples from gastric cancer (GC) patients without lymph node metastasis ( ), GC patients with lymph node metastasis ( ), and normal controls ( ). The lines denote the medians. Dot lines at the y-axis denote cut-off values. A significant difference between all histological groups was examined by ANOVA test. NS denotes no significant difference between groups. Receiver operating characteristics (ROCs) curves were used to discriminate patients with and without lymph node metastasis.