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      99mTc Sestamibi Thyroid Scan in Amiodarone-Induced Thyrotoxicosis Type I.

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          Abstract

          Amiodarone-induced thyrotoxicosis (AIT) type I describes inducement of clinical hyperthyroidism by excessive thyroidal iodine in the setting of latent Graves disease, and therapy differs from that used for AIT type II. A 65-year-old man previously on amiodarone for atrial fibrillation developed clinical hyperthyroidism. Diagnosis of AIT was made, but the type was not clear. Tc sestamibi thyroid scan showed diffusely increased uptake and retention in an enlarged thyroid gland, a pattern consistent with AIT type I. Methimazole was initiated and controlled the thyrotoxicosis. I iodide thyroid scan and uptake study performed later was consistent with Graves disease.

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          Author and article information

          Journal
          Clin Nucl Med
          Clinical nuclear medicine
          Ovid Technologies (Wolters Kluwer Health)
          1536-0229
          0363-9762
          Jul 2016
          : 41
          : 7
          Affiliations
          [1 ] From the Nuclear Medicine Division, Michael E. DeBakey Veterans Affairs Medical Center; and Department of Radiology, Baylor College of Medicine, Houston, TX.
          Article
          10.1097/RLU.0000000000001243
          27163459
          0855909c-a3f6-44fa-a56b-a890d9313e4b

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