Legends
Figure 1: Axial (A and B), sagittal (C), and coronal (D) post-contrast CT: There was a large (12cm in CC axis) presacral fat attenuating mass with internal soft tissue strands (white arrowheads in A-D). Except for its inferior margin that blends with the perineal fat (white arrow in B), the rest of its borders are well defined and do not show invasion to either the distended and displaced bladder (black arrow in C) or to the lumbosacral spine. The rectum is not visualized.
Figure 2: Hematoxylin and Eosin Staining: A (4x) and B (20x) are low and medium power photomicrographs respectively. They showed sheets of adipocytes admixed with lipoblasts separated by fibrous septa in an abundant myxoid background. C is a high-power (40x) photomicrograph and revealed variably sized lipoblasts admixed with adipocytes.