CXCL9 and melanoma: CXCL9 gene expression was higher in cancerous tissues compared to normal tissues (Fig. 8B); The expression of the CXCL9 gene was higher in patients with melanoma when the stage was I (Fig. 8C); Higher expression of the CXCL9 gene was higher in patients with distant metastases in melanoma (Fig. 8D); In immunotherapy, the expression of CXCL9 gene was higher in melanoma patients who responded to the immune checkpoint inhibitors (Fig. 8E-J).