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False-positive 131I uptake by the temporomandibular joint effusion
Min Zhang1, Yifan Zhang, Wei Huang
1From the Departments of *Nuclear Medicine; and †Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Abstract:
A 59-year-old man with papillary thyroid carcinoma underwent total thyroidectomy and received 2 separate 100-mCi doses of 131I about 5 months apart. A whole-body scan 4 days after the second dose revealed a focal uptake in the left temporomandibular joint (TMJ). The subsequent MRI examination demonstrated that the site of elevated iodine activity was caused by a TMJ effusion.
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