CC BY-NC-ND 4.0 · Avicenna J Med 2020; 10(03): 125-127
DOI: 10.4103/ajm.ajm_216_19
Case Report

Esophageal 99mTc-pertechnetate uptake mimicking an autonomous thyroid adenoma in a patient with subacute thyroiditis: a case report

Ahmad M Naser
Department of Internal Medicine, School of Medicine, The University of Jordan/Jordan University Hospital
Ayman A Zayed
Division of Endocrinology and Metabolism, Department of Internal Medicine, School of Medicine, The University of Jordan/Jordan University Hospital
Abdullah N Alhouri
Department of Internal Medicine, School of Medicine, The University of Jordan/Jordan University Hospital
Malik E Juweid
Department of Radiology and Nuclear Medicine, School of Medicine, The University of Jordan/Jordan University Hospital, Amman, Jordan
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Verantwortlicher Herausgeber dieser Rubrik: Financial support and sponsorship Nil.


Subacute thyroiditis (SAT) is one of the most common causes of thyrotoxicosis. Thyroid scans with radioiodine or technetium-99m pertechnetate (99mTc) are often performed in the workup of patients with thyrotoxicosis, particularly to differentiate between SAT and Graves’s disease. Although very helpful, thyroid scans are prone to pitfalls that may occasionally lead to misdiagnosis. These pitfalls are largely related to physiologic uptake of radioiodine or 99mTc in non-thyroidal tissue, such as salivary gland and stomach that may result in false-positive findings. We present herein a very rare case of SAT misdiagnosed as an autonomous thyroid adenoma most likely due to focal 99mTc uptake in the esophagus. This case may have implications for the management of patients with suspected SAT, who undergo a radioiodine or 99mTc thyroid scan.


Artikel online veröffentlicht:
04. August 2021

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