Use

Measurement of thyroglobulin (Tg) is primarily used to monitor patients with well‑differentiated thyroid cancer following thyroidectomy and ablation, especially to detect residual or recurrent disease. When thyroglobulin autoantibodies (TgAb) are present, an LC/MS/MS method is used to accurately quantify Tg levels that may be underestimated by immunoassay methods.