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Usefulness of (18)F-FDG PET/CT in a rare case of malignant pseudothyroiditis
Giorgio Treglia1, Annemilia Del Ciello, Guido Fadda
1From the Institutes of *Nuclear Medicine, †Radiology, and ‡Pathology, Catholic University of the Sacred Heart, Rome, Italy.
Abstract:
We report an unusual case of malignant pseudothyroiditis (MPT) occurred in a 35-year-old female patient presenting with symptoms and signs of thyroiditis. Fine-needle aspiration biopsy of the thyroid demonstrated the presence of a MPT induced by a metastatic extrathyroidal carcinoma. F-FDG-PET/CT showed increased radiopharmaceutical uptake in the thyroid, in multiple cervical and mediastinal lymph nodes, and in a right pulmonary nodule. Histological examination demonstrated the presence of a metastatic non-small cell lung cancer (NSCLC). In this unusual case of MPT F-FDG-PET/CT has been useful in staging the disease and in detecting the primary tumor site.
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