Duval MAS, et al. - This study assessed the accuracy of thyroglobulin measurements in the washout of fine needle aspiration (FNA-Tg) to detect differentiated thyroid carcinoma (DTC) metastases and the impact of thyroid status and anti-thyroglobulin antibodies (TgAb). As a follow-up examination in patients with DTC, ultrasound (US)-guided FNA-Tg demonstrated efficacy and usefulness, independent of TSH status and the presence of TgAb.