title: Apathetic thyrotoxicosis due to hemorrhage into a hyperfunctioning thyroid nodule after excessive anticoagulation.
abstract: Hyperfunctioning thyroid nodule was diagnosed in a 72-year-old woman. When the nodule reached a diameter of 3.5 cm, overt thyrotoxicosis of the apathetic type was precipitated by hemorrhage into the nodule during a period of excessive anticoagulation. All abnormal physical signs and symptoms as well as laboratory findings returned to normal within a month, without any specific treatment. It was possible to follow this process by repeated B-mode sonographic examinations and thyroid scans.
mesh_terms: D000236:Adenoma / Q000150:complications* / Q000175:diagnosis / Q000000981:diagnostic imaging; D000368:Aged; D005260:Female; D006470:Hemorrhage / Q000139:chemically induced / Q000150:complications*; D006801:Humans; D006980:Hyperthyroidism / Q000209:etiology*; D011877:Radionuclide Imaging; D013964:Thyroid Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000000981:diagnostic imaging; D014463:Ultrasonography; D014859:Warfarin / Q000009:adverse effects*
chemical_list: D014859:Warfarin