When is an iodine-123 (123I) thyroid scan indicated in the diagnosis of papillary thyroid carcinoma (PTC)?

Updated: Jun 18, 2020
  • Author: Ponnandai S Somasundar, MD, MPH, FACS; Chief Editor: Neetu Radhakrishnan, MD  more...
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Answer

An iodine-123 (123I) thyroid scan may be considered if the cytology report documents a follicular neoplasm, especially if serum thyroid-stimulating hormone (TSH) is in the low-normal range [65] . No radionuclide scan is needed for a reading of “suspicious for papillary carcinoma” or “Hürthle cell neoplasm”, as either lobectomy or total thyroidectomy is recommended depending on the nodule size and risk factors. [65]


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