Introduction: Clear cell renal carcinoma metastases to the thyroid gland are rare and only diagnosable after an immunohistochemistry analysis of the histological sample. The purpose of this article is to report a case of thyroid metastasis as the initial presentation of a clear cell renal carcinoma.
Case Report: Male patient with a solid nodule in the left lobe of the thyroid, 5.3 cm in diameter, suspicious of malignancy, for which a total thyroidectomy with central compartment lymphadenectomy was performed. Histology revealed two clear cell renal carcinoma metastases. After evaluation of the kidney, the patient underwent radical nephrectomy four months later.
Discussion: What makes this case interesting is that thyroid metastases as the initial presentation of renal cell carcinoma are rare, but if treated early, a 'double surgical resection' is possible, leading to a 5 year survival rate of 80%.
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