Figure 2. (a) Non-contrast enhanced abdominal CT image shows a large spherical, well defined soft tissue mass (small open arrow) and punctuate calcification (arrow) and the psoas muscle behind the mass (big open arrow). (b) Post-contrast CT image demonstrates marked and homogeneous enhancement of the mass (open arrow), right common iliac artery just medial to the mass (thin arrow) and psoas muscle position to the mass (arrowhead).