Tumor size (diameter >1 cm versus ≤1 cm) (X2 = 4.668, P = 0.031), pathological tumor stage (X2 = 13.193, P = 0.004), lymph node (LN) metastasis (X2 = 18.192, P < 0.001), distant metastasis (Fisher exact test, P = 0.001), American Thyroid Association (ATA) recommended risks (X2 = 17.453, P < 0.001), pre-ablation Tg (t’ = 6.900, P < 0.001) and TSH (t’ = −3.367, P = 0.001) displayed significant differences. Here, TG is linked to neoplasm.