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False-positive iodine-131 whole body scan due to a benign dermal lesion; intradermal nevus (131I uptake in a benign nevus)

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Abstract

Whole body radioiodine scanning (WBS), along with plasma thyroglobulin level, remains a reference method for detecting residual or metastatic differentiated thyroid cancer, however, false-positive WBS is not uncommon. External contaminations by body secretions or excretions, inflammation, and cystic structures mimicking metastases in WBS have been reported. Various benign and malignant tumors having different histopathological natures accumulate radioiodine, but intradermal melanocytic nevus was not previously described in the literature, as far as we know. This report describes an unusual cause of false-positive WBS after radioablation therapy due to an intradermal nevus, and the possible mechanisms are discussed.

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Authors and Affiliations

  1. Department of Nuclear Medicine, Ankara Ataturk Research and Training Hospital, Ankara, Turkey

    Nilufer Yildirim-Poyraz, Elif Ozdemir, Sule Kilinc, Zuhal Kandemir & Seyda Turkolmez

  2. Department of Plastic and Reconstructive Surgery, Ankara Ataturk Research and Training Hospital, Ankara, Turkey

    Cagla Amutkan

  3. Department of Pathology, Ankara Ataturk Research and Training Hospital, Ankara, Turkey

    Nuran Adiyaman

  4. Department of Endocrinology, Ankara Ataturk Research and Training Hospital, Ankara, Turkey

    Fatma Saglam & Bekir Cakir

Authors
  1. Nilufer Yildirim-Poyraz
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  2. Elif Ozdemir
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  3. Cagla Amutkan
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  4. Nuran Adiyaman
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  5. Sule Kilinc
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  6. Zuhal Kandemir
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  7. Fatma Saglam
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  8. Seyda Turkolmez
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  9. Bekir Cakir
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Correspondence to Nilufer Yildirim-Poyraz.

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Yildirim-Poyraz, N., Ozdemir, E., Amutkan, C. et al. False-positive iodine-131 whole body scan due to a benign dermal lesion; intradermal nevus (131I uptake in a benign nevus). Ann Nucl Med 27, 786–790 (2013). https://doi.org/10.1007/s12149-013-0746-0

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  • DOI: https://doi.org/10.1007/s12149-013-0746-0

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