TG and metastatic neoplasm: In most studies, FNA-Tg provides additional diagnostic value for locoregional recurrence post-surgery, although its cut-off values are still controversial.11 To avoid missing metastatic disease in patients who may benefit from lymphadenectomy, a combination of FNAC and FNA-Tg has been applied to accurately differentiate LLNM from benign LNs;7 however, it is unclear whether FNA-Tg measurements could effectively indicate lateral neck LNM in PTC.