Figure 6. Contrast-enhanced. (A, B) Axial and (C) coronal computed tomography scans of the abdomen performed 9 months after surgery. They show interval development of small bowel obstruction (asterisks) with a transition zone at the distal ileum (arrowhead). A residual retroperitoneal mass is still visible medial to the left psoas muscle (marrow) and in the perivertebral region at the level of L4 and L5 (dotted arrows).