TG and differentiated thyroid carcinoma: Post-surgical ablation of thyroid remnant with radioactive iodine (RAI) (remnant ablation) in differentiated thyroid cancer (DTC) is aimed to facilitate the early detection of recurrence based on serum thyroglobulin (Tg) measurement and/or RAI whole-body scan (WBS) and to obtain a post-therapy WBS, whose results may change the initial staging by identifying previously undiagnosed disease.