TG and thyroid cancer, nonmedullary, 2: analyzed the serum thyroglobulin (sTg) level as a potential biomarker in differentiation among FTC and benign thyroid follicular lesions, and according to their study, preoperative Tg levels had high specificity in predicting thyroid cancer in the case of suspicious follicular neoplasm, suggesting possible usefulness as a marker in the cytological diagnosis of indeterminate nodules (30).