CXCL9 and nasopharyngeal carcinoma: Hsin et al. showed that the expression of CXCL9 in nasopharyngeal carcinoma tissues was significantly higher than that in normal epithelium, and the serum concentration of CXCL9 was also significantly increased, and there was a statistically significant correlation between the concentration of CXCL9 and EBV DNA load.