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Updated: May 14, 2026
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Autoradiographic Measurements of [14C]-Iodoantipyrine in Rat Brain Following Central Post-Stroke Pain
Published on: July 18, 2016
False-positive scalp activity in 131I imaging associated with hair coloring
Di Yan1, Mohan Doss, Ranee Mehra
1Department of Medicine, Temple University School of Medicine, Philadelphia, Pennsylvania, USA.
Abstract:
A patient with metastatic papillary thyroid carcinoma (after surgical resection of tumor and positive lymph nodes) undergoing thyroid ablation therapy with (131)I is described. Whole-body scintigraphy was performed 1 wk after ablation therapy to evaluate the presence of residual disease. The whole-body images demonstrated an artifact caused by tracer accumulation in the patient's scalp related to recent hair coloring. Common etiologies of false-positive (131)I scintigraphic findings are briefly reviewed. The importance of taking preventative measures to decrease the number of false-positive findings and recognizing these findings when they occur is discussed.
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