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False-positive "necklace sign" on whole-body thyroid cancer survey--a case report
Sylvain Beaulieu1, David Djang, Satoshi Minoshima
1Division of Nuclear Medicine, University of Washington, Seattle, Washington, USA. sylvain.beaulieu@bigfoot.com
Journal of Nuclear Medicine Technology
|February 26, 2005
Abstract:
A woman with papillary thyroid carcinoma treated with surgery and postoperative 131I returned 4 y later for a whole-body survey. The imaging results initially suggested disease recurrence but were later found to be false positive and due to 131I uptake in a necklace that had been contaminated by the patient's saliva. This case stresses the importance of having the patient remove all jewelry before undergoing a radioiodine survey.

