title: False-positive I-131 uptake at a tracheostomy site. Discernment with Tl-201 imaging.
abstract: I-131 whole-body imaging is used in the follow-up evaluation of differentiated thyroid carcinoma. The authors report a case of spurious I-131 localization at a patient's tracheostomy stoma. Demonstration of this I-131 uptake as false positive was achieved by showing no Tl-201 localization at this site and a low thyroglobulin while the patient was hypothyroid. This strategy may discern spurious I-131 uptake and help avoid unnecessary I-131 therapy.
authors.affiliation: Medical Services, Veterans Affairs Medical Center, Lexington, Kentucky.
authors.forename: K B
authors.initials: KB
authors.lastname: Ain
authors.forename: W J
authors.initials: WJ
authors.lastname: Shih
mesh_terms: D002291:Carcinoma, Papillary / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000532:radiotherapy; D002294:Carcinoma, Squamous Cell / Q000601:surgery; D005189:False Positive Reactions; D005500:Follow-Up Studies; D006801:Humans; D007457:Iodine Radioisotopes; D007822:Laryngeal Neoplasms / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000628:therapy; D011877:Radionuclide Imaging; D013794:Thallium Radioisotopes; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000532:radiotherapy; D014139:Tracheostomy
chemical_list: D007457:Iodine Radioisotopes; D013794:Thallium Radioisotopes