TG and metastatic malignant neoplasm in the lymph nodes: We revealed that serum ps-Tg and lymph node metastasis rate are important indicators to predict ER achievement in this study, and further results showed that the cumulative risk of non-ER elevated with the increase of lymph node metastasis rate, regardless of ps-Tg level (low level ≤4.625 ng/mL or high level >4.625 ng/mL).