Figure 11c. Hepatic invasion by a primarily retroperitoneal teratoma. (a) Contrast-enhanced CT scan shows a predominantly fatty mass with a peripheral rim and central chunky calcification (arrow). (b) Photograph of the gross specimen shows that the mass is cystic with solid areas and papillary fronds. (c) Photomicrograph (original magnification, x400; hematoxylin-eosin stain) of a portion of the mass shows mature adipose tissue (arrow) and blood vessels.