CCL8, a chemokine, is shown to be negatively associated with patient prognosis in glioma, colorectal cancer, kidney cancer, uroepithelial cancer, testicular cancer, breast cancer, and endometrial cancer and positively associated with patient prognosis in thyroid cancer, head and neck tumors, and ovarian cancer in The Human Protein Atlas database. The gene discussed is CCL8; the disease is testicular cancer.