Detection of Thyroid Metastasis of Renal Transitional Cell Carcinoma Using FDG PET/CT
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CASE REPORT
Detection of Thyroid Metastasis of Renal Transitional Cell Carcinoma Using FDG PET/CT Yong-il Kim & Jong Jin Lee & Jin Ho Paik & Yu Kyeong Kim & Sang Eun Kim
Received: 25 November 2010 / Revised: 20 January 2011 / Accepted: 20 February 2011 / Published online: 22 March 2011 # Korean Society of Nuclear Medicine 2011
Abstract A 69-year-old man who was diagnosed with renal transitional cell carcinoma (TCC) underwent F-18 fluorodeoxyglucose (FDG) positron emission tomography with computed tomography (PET/CT) for detecting recurrence after chemotherapy. FDG PET/CT revealed multiple new hypermetabolic lesions in many places, including the right thyroid gland. Biopsy of the thyroid lesion was performed, and a diagnosis of metastatic TCC was made. We could detect thyroid metastasis of renal TCC by FDG PET/CT.
cancers, renal cell carcinoma (RCC) is the most common type that metastasizes to the thyroid gland [3]. However, there are few reports wherein kidney cancers other than RCC have metastasized to the thyroid. In this report, we describe a rare metastasis of renal transitional cell carcinoma
Keywords Renal transitional cell carcinoma . Thyroid . Metastasis . FDG . PET/CT
Introduction The thyroid gland is a rare site for metastasis [1]. The cancers that usually metastasize to the thyroid include breast, lung, colon, and kidney cancers [2]. Of all kidney Y.-i. Kim : Y. K. Kim : S. E. Kim Department of Nuclear Medicine, Seoul National University Bundang Hospital, Seoul, Korea J. J. Lee (*) Department of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, 86 Asanbyungwon-gil, Songpa-gu, Seoul 138–736, Korea e-mail: [email protected] J. H. Paik Department of Pathology, Seoul National University Bundang Hospital, Seoul, Korea
Fig. 1 Anterior maximal intensity projection (MIP) image of FDG PET/CT. FDG PET/CT showed a hypermetabolic lesion in the right thyroid (black arrow) with a maximum standardized uptake value (max SUV) of 8.7; this was thought to be thyroid malignancy. Other new hypermetabolic lesions were observed in multiple bones (left side of the mandible, C7 spine, left first rib, sternum, and right humerus) with maximum SUVs ranging from 5.6 to 11.1 (black arrowheads), and in mediastinal lymph nodes (LNs) (highest mediastinal, subaortic, subcarinal, and both hilar LNs) with maximum SUVs ranging from 4.5 to 13.1 (white arrowheads)
150 Fig. 2 Transaxial PET and CT images of the thyroid. a Transaxial PET image of the right thyroid shows intense FDG uptake with a maximum SUV of 8.7 (black arrow). b In combination with CT, a low attenuation nodule can be seen in the FDG-avid thyroid lesion (white arrow)
Nucl Med Mol Imaging (2011) 45:149–151
a
(TCC) to the thyroid using F-18 fluorodeoxyglucose (FDG) positron emission tomography with computed tomography (PET/CT).
Case Report Our patient was a 69-year-old man who was diagnosed with renal TCC in 2006. He underwent left nephroureterectomy and adjuvant chemotherapy. During follow-up CT, new nodules were observed in the liver
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