How is thyroid function assessed in the workup of follicular thyroid carcinoma (FTC)?

Updated: Jun 18, 2020
  • Author: Luigi Santacroce, MD; Chief Editor: Neetu Radhakrishnan, MD  more...
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Perform complete assessment of thyroid function in any patient with thyroid lumps. In addition to TSH, measure thyroxine, triiodothyronine, and serum levels of thyroglobulin, calcium, and calcitonin.

Levels above the reference range of thyroxine (T4; reference range, 4.5-12.5 mcg/dL), triiodothyronine (T3; reference range, 100-200 ng/dL), and TSH (reference range, 0.2-4.7 mIU/dL) may indicate thyroid cancer. Available studies are not specific for FTC.

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