An unusual adrenal metastasis secondary to Hürthle cell carcinoma of the thyroid

A 66-year-old woman with Hürthle cell thyroid carcinoma associated with a right adrenal gland metastasis suspected on a postradioiodine therapy scan, is reported. Histology specimens confirmed the suspicion. Adrenal metastases have never been reported previously in this kind of tumor. On radionuclide imaging, there was marked I-131 uptake in the tumor remnant and its metastases, and the tumor spread through both lymphatic and hematogenous routes, as shown by lymph node, bone, and lung metastases.