Gastric cancer research has shown that the IHC of CXCL9 was elevated in the stromal compartment of the tumor tissues compared to apparently normal tissue, which was not related to survival, while a high-CXCL9 mRNA expression was associated with better OS in patients with Epstein-Barr virus-related gastric cancer (Raja et al., 2017; Mu et al., 2022). Here, CXCL9 is linked to gastric cancer.