Univariate analysis showed that the proportion of bilateral distribution, intermediate-to-high risk stratification for recurrence, and III/IV stage of TNM were significantly higher than those of non-lymph node metastasis group (all p<0.05), while there were no statistical significances in BMI≥25 kg/m2, single foci, diameter>0.5cm, extracapsular invasion, HT, BRAF gene mutation rate, and distant metastasis (all p>0.05). The gene discussed is BRAF; the disease is metastatic malignant neoplasm in the lymph nodes.