CXCR1 and metastatic malignant neoplasm in the lymph nodes: One ELR+ CXC chemokine, one ELR− CXC chemokine, and the corresponding receptors among those with the highest area under the curve (AUC) values by univariate analysis (CXCL5/CXCR1 and CXCL10/CXCR3; Model 2) were also included to determine if CXC chemokine expression affects the prediction of lymph node metastasis.