title: Brown tumor of the sternum: a potential source of false-positive Tl-201 and Tc-99m subtraction imaging in the mediastinum.
abstract: Tl-201 and Tc-99m subtraction imaging is a well-established technique for detecting parathyroid adenomas. We report a case of a brown tumor of the upper sternum mimicking an ectopic mediastinal parathyroid adenoma on Tl-201 and Tc-99m subtraction imaging in a patient with hyperparathyroidism. This brown tumor showed Tl-201 uptake but not Tc-99m uptake and thus did not subtract out in this scan.
authors.affiliation: Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi. rkphulia@hotmail.com
authors.forename: R
authors.initials: R
authors.lastname: Kumar
authors.forename: R
authors.initials: R
authors.lastname: Gupta
authors.forename: A
authors.initials: A
authors.lastname: Malhotra
mesh_terms: D000236:Adenoma / Q000000981:diagnostic imaging*; D000328:Adult; D005260:Female; D005357:Fibrous Dysplasia of Bone / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D006961:Hyperparathyroidism / Q000150:complications; D008482:Mediastinum / Q000000981:diagnostic imaging*; D010282:Parathyroid Neoplasms / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m; D013249:Sternum / Q000000981:diagnostic imaging* / Q000473:pathology; D013382:Subtraction Technique; D013794:Thallium Radioisotopes
chemical_list: D019275:Radiopharmaceuticals; D013794:Thallium Radioisotopes; D013670:Sodium Pertechnetate Tc 99m