Renal metastasis from thyroid cancer is uncommon, and computed tomography and magnetic resonance imaging findings cannot clearly differentiate renal metastases from renal cell carcinoma. However, T-131 total body scans almost always reveal radioiodine avidity in metastatic renal lesions from thyroid cancer but not in renal cell carcinoma. Hence, T-131 total body scans can be used for diagnosis and treatment planning in this rare patient population. These findings were reported mostly from the follicular variant of papillary thyroid cancer and follicular thyroid cancer. This report presents
a case of renal metastasis from Hurthle cell follicular carcinoma with a literature review. The previous report on treatment options in well-differentiated renal thyroid cancer metastases included nephrectomy and radioiodine treatment. Patients with renal metastases typically also had other distant metastases and thus had poor prognoses and treatment outcomes.

Keywords: Renal metastasis, Hurthle cell carcinoma, Follicular carcinoma, Thyroid cancer, Total body scan, MRT, CT