title: An autonomous functioning cystic thyroid adenoma. An unusual occurrence.
abstract: An asymptomatic thyroid nodule that appeared cystic on ultrasound was seen in a 14-year-old girl. Tc-99m pertechnetate thyroid imaging was expected to show a cold nodule, but surprisingly revealed a hyperfunctioning nodule. A partial thyroidectomy revealed an hemorrhagic cystic adenoma. The occurrence of a cystic nodule, which continued to show hyperfunction, is unusual.
mesh_terms: D000236:Adenoma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D000293:Adolescent; D005260:Female; D006801:Humans; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D013961:Thyroid Gland / Q000503:physiopathology*; D013964:Thyroid Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D014463:Ultrasonography
chemical_list: D013670:Sodium Pertechnetate Tc 99m