Increased 18F-FDG uptake mimicking thyroid cancer in a patient with Hashimoto's thyroiditis

Publikation

Increased 18F-FDG uptake mimicking thyroid cancer in a patient with Hashimoto's thyroiditis

Wissenschaftlicher Artikel/Review - 01.09.2003

Schmid Daniel T, Kneifel Stefan, Stöckli Sandro, Padberg Barbara-C, Merrill Griff, Goerres Gerhard W

Zitation

Schmid D, Kneifel S, Stöckli S, Padberg B, Merrill G, Goerres G. Increased 18F-FDG uptake mimicking thyroid cancer in a patient with Hashimoto's thyroiditis. European radiology 2003; 13:2119-21.

Art

Wissenschaftlicher Artikel/Review (Englisch)

Zeitschrift

European radiology 2003; 13

Veröffentlichungsdatum

01.09.2003

ISSN (Druck)

0938-7994

Seiten

2119-21

Kurzbeschreibung/Zielsetzung

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.