Serum marker used after surgery for differentiated thyroid cancer is: (A) T4, (B) Thyroglobulin, (C) Calcitonin, (D) PTH
Answer is B. Measurement of peripheral Thyroglobulin has predictive value for the recurrence of differentiated thyroid cancer (ie papillary and follicular thyroid cancers),locally or in metastatic deposits after initial total thyroidectomy . Basal or stimulated calcitonin levels are sensitive markers for primary or recurrent medullary thyroid cancer. Source : Sabiston 20th edition Pg : 886