Lipid-rich benign adrenal adenoma

Unenhanced (A) and enhanced (B) axial CT images of an incidentally discovered 2.8 × 3.5 cm right adrenal mass (arrows). On the unenhanced image, the CT attenuation was 5 HU and diagnostic of a lipid-rich adrenal mass. With contrast administration, the adrenal mass was shown to be not vascular (B), enhanced homogenously, and had rapid contrast washout (>50% at 10 minutes).