CT and MR demonstration of fat within an adrenal cortical carcinoma.

Detection of fat within an adrenal primary mass is virtually pathognomonic of myelolipoma, and in most cases such a diagnosis excludes any further diagnostic and therapeutic approaches. We report our findings, with computed tomography (CT) and magnetic resonance (MR), of the first, to our knowledge, pathologically proven case of fat tissue within an adrenal cortical carcinoma. We also discuss the possible origin of fat within such malignancies and the potential diagnostic dilemmas it might cause.