To further investigate the expression of Egr1 and HOXA11 in peritoneal metastatic lesions of GC patients, the immunohistochemistry and immunofluorescence experiments were conducted, as shown in Fig. 2J, K, the HBME1 and Egr1 were strongly expressed in the omentum, while HOXA11 expression was noticeably high in the tumor tissues. This evidence concerns the gene EGR1 and gastric cancer.