A Rare Case of Metastasis to the Thyroid Gland from Renal ClearCell Carcinoma 11 Years after Nephrectomy and ConcurrentPrimary Esophageal Carcinoma

Renal cell carcinoma is known to cause metastasis to unusual sites, which can be both synchronous or metachronous. )yroidgland is a rare site for metastasis, but when it occurs, renal cell carcinoma is the most common primary neoplasm. We report thecase of a 81-year-old female patient who had a significant medical history of right clear cell renal carcinoma with adrenalmetastasis. She underwent right radical nephrectomy and adrenalectomy followed by radiofrequency ablation of left adrenalmetastasis and systemic chemotherapy with sunitinib. Eleven years later, she presented with dysphagia and was found to havedistal esophageal adenocarcinoma. On imaging, there was incidental detection of a left renal mass lesion and a right thyroidnodule, which on histopathology and immunohistochemistry were confirmed to be clear cell carcinoma of renal origin.