Figure 6.

A 66-year-old man with known right renal cell carcinoma, status post right nephrectomy, who developed metastases in the known adrenal adenoma consistent with ACT. (A) Axial unenhanced CT image shows a left adrenal mass with a hyperattenuating component (arrowhead). Note also a left renal mass consistent with renal cell carcinoma (arrow). (B, C) [¹⁸F]Fluorodeoxyglucose (FDG)-positron emission tomography (PET) (B) and PET/CT (C) images depict increased FDG activity in the hyperattenuating component (arrowheads), consistent with ACT (adenoma with metastases), which was subsequently proved on pathologic examination.