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Figure 10a.  Collision tumor with associated myelolipoma and adenoma. (a, b) Nonenhanced (a) and contrast-enhanced (b) CT scans show a heterogeneous mass of the left adrenal gland. The mass represents the association of a soft-tissue mass, calcification, and a fatty component. (c) Photomicrograph (original magnification, x4; hematoxylin-eosin stain) shows a sharp demarcation between myelolipomatous (left side of image) and adenomatous (right side of image) elements.