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Arquivos Brasileiros de Endocrinologia & Metabologia
On-line version ISSN 1677-9487
GONCALVES, Ana Paula Cançado et al. Benign hepatic cyst mimicking thyroid carcinoma metastasis. Arq Bras Endocrinol Metab [online]. 2009, vol.53, n.6, pp.777-782. ISSN 1677-9487. http://dx.doi.org/10.1590/S0004-27302009000600014.
INTRODUCTION: 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.
Keywords : Hepatic cyst; iodine whole body scan; thyroid carcinoma.