Adrenal cortical adenoma with extensive fat cell metaplasia.

This report describes a large adrenal cortical tumor with a significant component of mature adipose tissue in a 40 year old woman. No bone marrow elements were identified in multiple sections. This lesion, representing most likely an adrenal cortical adenoma with extensive fat cell metaplasia, has not been previously reported and must be differentiated from adrenal myelolipoma.