Unusual 131 I Uptake Caused by Paronychia in a Patient With Papillary Thyroid Cancer.

ABSTRACT:A 33-year-old woman was referred for radioiodine 6 months after total thyroidectomy and neck dissection for papillary thyroid cancer. Posttherapy whole-body 131 I scintigraphy showed not only the known activity in the neck but also accumulated activity in both feet. SPECT/CT revealed focal uptake in bilateral great toenails. On further clinical evaluation and follow-up, the patient was diagnosed as paronychia of the great toenails.