False-positive Iodine-131 Scan Caused by Scab Tissue Uptake

Full Article

TK Chow, WH Ma, WY Ho

Hong Kong J Radiol 2018;21:132-5

DOI: 10.12809/hkjr1816825

Whole-body Iodine-131 scintigraphy (I-131 WBS) is a common and useful method to detect residual thyroid tissue, local recurrence, or distant metastasis in differentiated thyroid cancer. However, radioiodine uptake is not only seen in thyroid tissue or tumours. Various false-positive findings in I-131 WBS due to physiological and pathological causes have been reported. This report describes an unusual cause of false-positive I-131 WBS due to radioiodine uptake in scab tissue.


Author affiliation(s):
TK Chow, WH Ma, WY Ho: Nuclear Medicine Unit, Department of Radiology, Queen Mary Hospital, Pokfulam, Hong Kong