Metastases of Renal Cell Carcinoma to the Thyroid Gland with Synchronous Benign and Malignant Follicular Cell-Derived Neoplasms

Figure 1

Metastatic renal cell carcinoma. (a and b) Computed tomography showed the renal metastatic mass (arrow) in the mediastinum. (c) Fine-needle aspiration biopsy guided by endoscopic ultrasonography of the mediastinal tumor revealed clusters of epithelial malignant cells morphologically fitting with metastatic clear cell renal cell carcinoma (Diff-Quick).