TG and neoplasm: After adjusting for other factors (i.e., age, sex, tumor histology, and resection margins), there was also statistical significance between tumor burden and serum thyroglobulin levels (β ± SE = 0.10 ± 0.01, p < 0.001 for tumor size and β ± SE = 0.36 ± 0.02, p < 0.001 for number of LNM).