WNT7A and gastric cancer: One study showed that its expression was decreased in gastric cancer tissues and gastric cancer cell lines, and the immunohistochemistry positivity rate of gastric cancer tissues was only 51.3%, whereas the positivity rate of normal gastric mucosal tissues was as high as 86.7% (30), and its low expression often suggests that the prognosis of gastric cancer patients is poor; another study showed that WNT7A elevated expression, which promotes migration and invasion of gastric cancer cells.