Univariate analysis revealed that age >55, follicular or aggressive histopathologic types, cumulative 131I dose >600 mCi, stimulated Tg >168.1 ng/ml, Tg-DT ≤12 months, lung metastases, bone metastasis, SUVmax >20.27 g/ml, SUVmean >7.46 g/ml, SUVpeak >7.8 g/ml, tTLG >45.74 g/ml×cm3, and tMTV >5.78 cm3 were factors in predicting survival (p<0.05). The gene discussed is TG; the disease is bone metastasis.