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False-positive I-131 Scan by Contaminated Muffler in a Patient with Thyroid Carcinoma  

Seo, Han-Kyung (Department of Nuclear Medicine, Chonbuk National University Hospital)
Kim, Min-Woo (Department of Nuclear Medicine, Chonbuk National University Hospital)
Jeong, Hwan-Jeong (Department of Nuclear Medicine, Chonbuk National University Hospital)
Sohn, Myung-Hee (Department of Nuclear Medicine, Chonbuk National University Hospital)
Publication Information
Nuclear Medicine and Molecular Imaging / v.40, no.1, 2006 , pp. 51-52 More about this Journal
Abstract
A 39-year-old female patient who had undergone a total thyroidectomy for a papillary thyroid carcinoma underwent a whole body scan with I-131. The I-131 scan was performed 72 hours after administering 185 MBq (5 mCi) of an I-131 solution. The anterior image of the head, neck, and upper chest showed multiple areas of increased uptake in the mediastinal area considering of functional metastasis. However, radioactivity was not evident in the image taken after removing her clothes and muffler. The image obtained after placing the muffler on the pallet showed that the radioactivity was still present. It is well known that artifacts on an I-131 scan can be produced by styling hair sputum, drooling during sleep, chewing gum, and paper or a cloth handkerchief that is contaminated with the radioactive iodine from either perspiration or saliva. This activity might be mistaken for a functional metastasis. Therefore, it is essential that an image be obtained after removing the patient's clothes. In this study, artifacts due to a contaminated muffler on the I-131 scan were found. These mimicked a functional metastasis of the mediastinal area in a patient with a papillary thyroid carcinoma.
Keywords
I-131 scan; artifact; contamination; differentiated thyroid carcinoma;
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1 Barzel US, Chun KJ. Artifact of I-131 whole-body scan with thoracic vertebral uptake in a patient with papillary thyroid carcinoma. Clin Nucl Med 1997;22:855
2 Bybel B, Beebe W, Kim BY, Faiman C. Contamination of a bracelet following iodine-131 therapy: a case report. J Nucl Med Technol 2000;28:257-8
3 Pochis WT, Krasnow AZ, Isitman AT, Cerletty JM, Metin Kir K, Hellman RS, et al. The radioactive handkerchief sign. A contamination artifact in I-131 imaging for metastatic thyroid carcinoma. Clin Nucl Med 1990;15:491-4   DOI
4 Chandramouly BS, Scagnelli T, Burgess CK. Artifact on iodine-131 whole body scan due to contaminated handkerchief. Clin Nucl Med 1989;14:30-2
5 Ozguven M, Iigan S, Arslan K, Karacalioglu AO, Yuksel D, Dundar S. Unusual patterns of I-131 contamination. Ann Nucl Med 2004;18:271-4   DOI
6 Schuster DM, Alazraki N. Esophageal scarring causing false-positive uptake on I-131 whole-body imaging. Clin Nucl Med 1998;23:334   DOI   ScienceOn