title: [Benign hepatic cyst mimicking thyroid carcinoma metastasis].
abstract: BACKGROUND
  The follow-up of differentiated thyroid carcinoma (DTC) for detecting persistent or recurrent disease is based on iodine whole body scan (WBS), the evaluation of the tumor marker thyroglobulin (Tg), the anti-thyroglobulin antibody (anti-Tg) and neck ultrasonography (US). Well known false-positive causes of WBS include inflammatory processes, some non-thyroid tumors, kidney or even sebaceous cysts .
  
  
  METHODS
  We reported a case of false-positive WBS, after therapeutic dose of (131I) NaI.
  
  
  RESULTS
  We enphasize the importance of recognizing benign liver cysts mimicking DTC metastasis.
  
  
  CONCLUSIONS
  False-positive and negative results may occur with WBS and must be recognized to avoid mismanagement.
authors.affiliation: Hospital Felício Rocho, Belo Horizonte, MG, Brasil.
authors.forename: Ana Paula Cançado
authors.initials: AP
authors.lastname: Gonçalves
authors.forename: Carolina Souza
authors.initials: CS
authors.lastname: Jorge
authors.forename: Jader Pereira
authors.initials: JP
authors.lastname: Resende
authors.forename: José Ribamar Silva
authors.initials: JR
authors.lastname: Villela
authors.forename: Maria Marta Sarquis
authors.initials: MM
authors.lastname: Soares
authors.forename: Adauto Versiani
authors.initials: AV
authors.lastname: Ramos
mesh_terms: D000368:Aged; D002291:Carcinoma, Papillary / Q000000981:diagnostic imaging* / Q000556:secondary; D003560:Cysts / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D008107:Liver Diseases / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D013954:Thyroglobulin / Q000627:therapeutic use; D013964:Thyroid Neoplasms; D014463:Ultrasonography; D051598:Whole Body Imaging
chemical_list: D007457:Iodine Radioisotopes; D013954:Thyroglobulin