Rare benign tumor composed of mature fat tissue & hematopoietic elements (myeloid & erythroid cells) .
Most tumors are heterogeneous fatty adrenal masses
Low-attenuation of fat density (-30 to -90 HU) .
T1WI in phase: Typically hyperintense .
Fat suppression sequences: Loss of signal .
Presence of pure fat within tumor is diagnostic
Differential diagnosis- Adrenal adenoma- It shows low attenuation however no true fat density is seen.
It is usually incidental and no further workup is required.