Adrenal imaging.

Adrenal masses are frequently encountered in imaging practices. Simple detection by radiologists is insufficient as many of these masses can now be characterized by imaging alone. Some masses can be characterized by their simple appearances, but most cannot. This article will describe the different principles used by imagers to lead them to the correct diagnosis for the overwhelming majority of lesions. Imagers should be familiar with these techniques to expedite treatment, especially in cancer patients and so prevent unnecessary biopsies, costs, and anxiety.