CXCR4 and metastatic malignant neoplasm in the lymph nodes: The single-factor and multi-factor analysis of risk factors for lymph node metastasis showed that tumor tissue TNM staging, vascular invasion, and high CXCR4 levels; lymph node tissue short axis diameter, signal intensity, T2WI signal intensity, and ADC values are all related to HNSCC lymph node metastasis.