title: Severe thyrotoxicosis caused by an ectopic intrathoracic goiter.
abstract: The case of a 71-year-old woman with severe thyrotoxicosis due to an ectopic multinodular intrathoracic goiter is described. Previously reported cases with intrathoracic ectopic thyroid tissue were either nontoxic, or, if thyrotoxic, were a direct continuation of the tissue of the normally located gland. This mass was proved to be of thyroid origin using Tc-99m sodium pertechnetate scanning.
mesh_terms: D000368:Aged; D002828:Choristoma / Q000150:complications / Q000000981:diagnostic imaging*; D005260:Female; D006045:Goiter, Substernal / Q000150:complications* / Q000000981:diagnostic imaging; D006801:Humans; D006980:Hyperthyroidism / Q000209:etiology*; D011877:Radionuclide Imaging; D013899:Thoracic Neoplasms / Q000150:complications / Q000000981:diagnostic imaging*; D013961:Thyroid Gland / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed