TG and thyroid gland carcinoma: A meta‐analysis of 9094 patients found a sensitivity and specificity of thyroglobulin to detect persistent thyroid cancer of 96% and 95% after thyroid hormone withdrawal, 93% and 88% after TSH stimulation, 78% and 98% on thyroid hormone, and 76% and 97% in patients who did not undergo remnant ablation.40