Abstract
We report two cases of thyroid metastasis from renal cell carcinoma after nephrectomy. The cases were a 71-year-old female who had undergone left nephrectomy for left kidney cancer 24 years earlier and a 69-year-old female who undergone right nephrectomy with right kidney cancer three years earlier. In both cases, right anterior cervical swelling was the main complaint and fine-needle aspiration was performed because a tumor of the thyroid right lobe was observed. The result was Class Ⅴ and Class Ⅲ, respectively, and surgical operation was performed.
In both cases, the result of pathological diagnosis was clear cell type renal cell carcinoma, which was diagnosed as thyroid metastasis of renal carcinoma.
It has been reported that the survival rate of cases with distant metastasis of kidney cancer is significantly increased by surgical operation, so we should consider the possibility of metastasis and judge whether to perform surgery for cases of thyroid tumors with a history of renal cancer.
