title: 131I and 124I Accumulation in a Thymic Cyst.
abstract: A 65-year-old woman presented with increased human thyroglobulin (3.3 ng/mL) 5 years after resection of a papillary thyroid carcinoma and successful I radioiodine therapy. I whole-body scintigraphy showed a small focus ventrally in the right lower neck, leading to suspicion of a papillary thyroid carcinoma recurrence. I-PET/CT and real-time PET/US fusion matched to a small hypoechoic/anechoic ovoid structure situated between the right sternoclavicular joint and the brachiocephalic trunk. After surgical resection, histology allowed a diagnosis of thymic cyst. A follow-up I whole-body scintigraphy showed no residual iodine accumulation.
authors.affiliation: From the *Clinic of Nuclear Medicine, Jena University Hospital, Jena; and †Institute of Pathology Bad Berka, Bad Berka, Germany.
authors.forename: Tom
authors.initials: T
authors.lastname: Wilhelm
authors.forename: Thomas
authors.initials: T
authors.lastname: Winkens
authors.forename: Almut
authors.initials: A
authors.lastname: Kunze
authors.forename: Martin
authors.initials: M
authors.lastname: Freesmeyer
mesh_terms: D000368:Aged; D002277:Carcinoma / Q000000981:diagnostic imaging*; D002291:Carcinoma, Papillary; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D008476:Mediastinal Cyst / Q000000981:diagnostic imaging*; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging*; D000072078:Positron Emission Tomography Computed Tomography; D019275:Radiopharmaceuticals; D000077273:Thyroid Cancer, Papillary; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging*
chemical_list: D007457:Iodine Radioisotopes; D019275:Radiopharmaceuticals