Development of Subclinical Hyperthyroidism due to Graves' Disease in a Hypothyroid Woman who had Undergone Hemithyroidectomy for Adenomatous Goiter and Radiotherapy for Nasopharyngeal Cancer

Endocrine Journal

Hiroshi OZAKI²  Kouki MORI²  Saeko HOSHIKAWA²  Katsumi YOSHIDA¹  Sadayoshi ITO²  Yoshinori NAKAGAWA² 

[1] Department of Medical Technology, Tohoku University School of Health Sciences;Division of Nephrology, Endocrinology and Vascular Medicine, Tohoku University Graduate School of Medicine

关键词: Radiotherapy;    Hypothyroidism;    Graves' disease;    Thyroidectomy;   

DOI  :  10.1507/endocrj.K06-132

学科分类：内分泌与代谢学

来源: Japan Endocrine Society

【 摘 要 】

References(7)Cited-By(1)A variety of thyroid disorders develop following external radiation to head and neck cancers. Hypothyroidism is the most common clinical consequence of the radiotherapy and lifelong thyroid hormone replacement is required in many cases. Patients who received both hemithyroidectomy and the external radiation to the neck are at especially high risk for permanent hypothyroidism. Here we report an unusual case with radiation-induced hypothyroidism who had undergone hemithyroidectomy for adenomatous goiter 8 years before the radiotherapy for nasopharyngeal cancer and subclinical hyperthyroidism due to Graves' disease developed during thyroxine replacement therapy. Thus subclinical hyperthyroidism due to Graves' disease can develop in patients with radiation-induced hypothyroidism even if they have undergone hemithyroidectomy for thyroid nodules. Therefore careful and periodic evaluation of thyroid function is required even on adequate thyroxine replacement therapy.

【 授权许可】

Unknown