Increased 18F-FDG uptake mimicking thyroid cancer in a patient with Hashimoto's thyroiditis
Daniel T Schmid, Stefan Kneifel, Sandro Stöckli, Barbara-C Padberg, Griff Merrill & Gerhard W Goerres
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abstract
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We report the case of a 68-year-old patient with a known
paravertebral malignant schwannoma, sent to us for postoperative
staging. A combined whole-body PET/CT scan showed only poor
(18)F-fluorodeoxyglucose uptake in the region of the primary tumor
but distinct increased fluorodeoxyglucose uptake in the left and
right thyroid gland. Thyroid sonography showed two hypoechogenic
nodules. Ultrasound-guided fine-needle aspiration biopsy of one
nodule showed oxyphil transformed cells, compatible with malignancy.
Based on these findings, the patient underwent a subtotal
thyroidectomy. Histopathology of the specimen revealed a chronic
follicular Hashimoto's thyroiditis. This case demonstrates that
Hashimoto's thyroiditis can mimic thyroid cancer in PET but also in
sonography and fine-needle aspiration biopsy.
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citation
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Schmid D T, Kneifel S, Stöckli S, Padberg B C, Merrill G, Goerres G
W. Increased 18F-FDG uptake mimicking thyroid cancer in a patient
with Hashimoto's thyroiditis. European radiology 2003; 13:2119-21.
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type
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journal paper/review (English)
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date of publishing
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9-2003
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journal title
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European radiology (13/9)
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ISSN print
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0938-7994
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pages
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2119-21
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PubMed
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12928962
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DOI
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10.1007/s00330-002-1619-4
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