Figure 5.

23-year-old female who was found incidentally to have multiple retroperitoneal and perihepatic masses in an abdominal CT following a motor vehicle collision. (a) Axial contrast-enhanced CT image shows moderate bilateral hydronephrosis due to distal ureteral obstruction by retroperitoneal masses (not shown). Large mesenteric mass is also seen (a, solid arrow). Nodularity is seen in the omentum (a, open arrow). The patient also developed a metastatic subcutaneous soft-tissue mass along the surgical incision of a prior open biopsy (b, solid arrow).