腎細胞癌摘除10年後に孤立性甲状腺転移を認めた1例

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  • Solitary Metastasis of Renal Cell Carcinoma to the Thyroid Gland 10 Years after Nephrectomy.

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A 71-year-old woman who noticed an abnomal mass in her neck was admitted to the hospital. There was a previous history of undergoing a right nephrectomy for right renal cell carcinoma 10 years earlier. Ultrasonography and Computed Tomography of the neck revealed a tumor mass in the right thyroid gland. 201T1 scanning showed defuse uptake by the right thyroid gland. The result of an aspiration cytology was class II. We suspected an adenomatous goiter of the thyroid gland, but could not rule out a possibility of malignancy. Right hemithyroidectmy was performed. Histological examination of the resected specimen showed clear cell carcinoma, and the possibility of a primary thyroid tumor was ruled out by immunohistochemical stainig for thyroglobulin. Thus, metastasis of renal cell carcinoma to the thyroid gland was diagnosed. There were no lesions in the other organs by pre-and postoperative close examination. Solitary metastasis of renal cell carcinoma to the thyroid gland was definitely diagnosed. Solitary metastasis of renal cell carcinoma to the thyroid gland is extremaly rare, and to the best of our knowlegde, this is the 13th case in the Japanese literature.

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