MTD (p < 0.001), MDLNM (p = 0.001), NLNM (p < 0.001), LNR (p < 0.001), pathological stage (p = 0.024), T stage (p < 0.001), N stage (p = 0.006) and preoperative Tg level (p < 0.001) were prognostic factors for PTC with lymph node metastasis (Figure 2). Here, TG is linked to metastatic malignant neoplasm in the lymph nodes.