Then, in the analysis of COX7A1 and clinical information, we found that the expression of COX7A1 was higher in elderly patients (over 56 years old) and gastric cancer patients whose tumors invaded the whole layer of gastric wall (both P < 0.05, Fig. 9D), indicating that COX7A1 may be related to the invasion and metastasis of gastric cancer patients. This evidence concerns the gene COX7A1 and gastric cancer.