Besides, COL5A2 expression was elevated in three common histological subtypes of GC, including intestinal, diffused, and mixed gastric adenocarcinomas, as compared with that in gastric tissues or mucosa in Wang, Cho, Chen, and DErrico datasets (Figure 1b, Figures A1 and A2, P < 0.05). This evidence concerns the gene COL5A2 and gastric adenocarcinoma.