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KMID : 0356620130280010061
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Journal of Korean Society of Endocrinology
2013 Volume.28 No. 1 p.61 ~ p.64
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Anaplastic Thyroid Carcinoma Following Radioactive Iodine Therapy for Graves’ Disease
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Kim Sun-Hwa
Kim Hee-Young
Choi Dong-Seop
Kim Sin-Gon
Jung Kwang-Yoon
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Abstract
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Radioactive iodine (RAI) therapy has been used as a treatment option for Graves’ disease, and it has been widely accepted to be safe. On the other hand, some evidence suggests that RAI therapy is possibly associated with a small increased risk of thyroid cancer. Herein, we report a rare case of anaplastic thyroid carcinoma (ATC) associated with Graves’ disease, following RAI treatment. A 42-year-old woman had been diagnosed with Graves’ disease and although she was treated with an antithyroid drug, she remained in a hyperthyroid state, which led to two RAI treatments. More than 10 years later, the patient revisited our clinic due to hoarseness, dysphagia, and dyspnea, which had lasted for 2 months. Neck computed tomography suggested thyroid carcinoma and a lymph node biopsy showed metastatic papillary carcinoma. The patient underwent total thyroidectomy and was finally diagnosed as having an ATC. It is not clear if the occurrence of ATC reported here was influenced by the RAI therapy or alternatively, it may only represent the delayed recognition of a rare change in the natural history of Graves’ disease. Nevertheless, this report is worthwhile since it presents a very rare case of ATC that occurred eleven years after the RAI therapy for Graves’ disease.
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KEYWORD
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Thyroid cancer, anaplastic, Graves disease, Radioactive iodine therapy
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