It has been reported that FDG-PET/CT is also predictive of OS in DTC patients with high serum Tg or with advanced stage cancers,[13,24] while in our study only Tg normalized at short-term follow-up was predictive of OS: the 9-years OS was 100% in patients with Tg normalized at short-term follow-up and 72% in those without (P < .05). Here, TG is linked to cancer.