A thyroid metastasis revealing an occult renal clear-cell carcinoma.

@article{Fabbro1987ATM,
  title={A thyroid metastasis revealing an occult renal clear-cell carcinoma.},
  author={S Dal Fabbro and Gaetan Monari and Renzo Barbazza},
  journal={Tumori},
  year={1987},
  volume={73 2},
  pages={
          187-90
        }
}
A case of renal clear-cell carcinoma presenting as a nodular thyroid metastasis is reported. The possibility of a metastatic lesion from the kidney should be taken into account in each case of clear-cell thyroid lesion. Fine needle aspiration cytology may be unable to discriminate between the renal or thyroid origin of such lesions unless PAS staining is performed.