TG and neoplasm: Table 1 shows the basic characteristics of the 43 patients, including body weight, height, body mass index (BMI), tumor size at diagnosis, soft tissue involvement or distant metastasis at diagnosis, previous accumulated 131I treatment dose, renal function, rhTSH preparation before RAI treatment or not, stimulated Tg after surgery, stimulated Tg before RAI treatment in this study, and post-therapy whole body scan results.