title: False-positive scalp activity in 131I imaging associated with hair coloring.
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.
authors: Department of Medicine, Temple University School of Medicine, Philadelphia, Pennsylvania, USA.
authors: Di
authors: D
authors: Yan
authors: Mohan
authors: M
authors: Doss
authors: Ranee
authors: R
authors: Mehra
authors: Rosaleen B
authors: RB
authors: Parsons
authors: Barton N
authors: BN
authors: Milestone
authors: Jian Q
authors: JQ
authors: Yu
mesh_terms: D000328:Adult; D002277:Carcinoma / Q000000981:diagnostic imaging; D002291:Carcinoma, Papillary; D004396:Coloring Agents; D005189:False Positive Reactions; D005260:Female; D006197:Hair / Q000737:chemistry*; D006801:Humans; D007457:Iodine Radioisotopes; D011877:Radionuclide Imaging; D012535:Scalp / Q000000981:diagnostic imaging*; D000077273:Thyroid Cancer, Papillary; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging; D051598:Whole Body Imaging
chemical_list: D004396:Coloring Agents; D007457:Iodine Radioisotopes