A thyroid nodule representing metastatic renal carcinoma.

Metastatic neoplasms to the thyroid that become clinically apparent are rare, but a patient that presents with a thyroid nodule and a history of a prior malignancy elsewhere (especially a renal neoplasm) should be thought to have a metastatic nodule first and a nodule of thyroid origin second. This report describes a 66-year-old woman who presented with a large symptomatic thyroid nodule and a history of a right nephrectomy for renal carcinoma two years previously.