False-positive "necklace sign" on whole-body thyroid cancer survey--a case report.
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.
Beaulieu
Sylvain
S
Division of Nuclear Medicine, University of Washington, Seattle, Washington, USA. sylvain.beaulieu@bigfoot.com
Djang
David
D
Minoshima
Satoshi
S
D000328:Adult; D016477:Artifacts; D003951:Diagnostic Errors / Q000517:prevention & control*; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes / Q000627:therapeutic use*; D008420:Manufactured Materials; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging / Q000517:prevention & control*; D011877:Radionuclide Imaging; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy* / Q000601:surgery; D014915:Whole-Body Counting / Q000379:methods*
D007457:Iodine Radioisotopes