Thyroid carcinoma, particularly papillary thyroid carcinoma, may present with a wide range of clinical course--from an indolent to an aggressive form of poorly differentiated thyroid carcinoma. About 10% of patients with papillary thyroid cancer develop distant metastasis to the lymph nodes, lungs, mediastinum, or bone. Several cases of unusual metastasis to the kidney have been reported previously. A rare case of renal metastasis from papillary thyroid carcinoma and the roles of PET and SPECT-CT in its detection are presented here.

Human ; Female ; Aged ; Kidney Neoplasms ; Mediastinum ; Thyroid Neoplasms ; Tomography, Emission-computed, Single-photon ; Tomography, X-ray Computed