The expression of 2 miRNAs (miR-21, miR-133b) was evaluated by qRT-PCR using a total of 145 tissue samples (33 gastric adenocarcinomas, 37 esophageal adenocarcinomas, 47 normal gastric, 28 normal esophagus). miR-191 and miR-103a-5p were used for normalization and the data are shown as relative fold change. The box-and-whisker plots are used to demonstrate the data. The bottom and the top edges of the box mark the 25th and 75th percentile, respectively. The areas between the box and the whisker extend to the 10th and 90th percentile. p ≤0.05 was considered statistically significant. NG, normal gastric; GC, gastric adenocarcinomas; NS, normal esophagus; EAC, esophageal adenocarcinomas.