Figure 4.

CT images for Case 2, axial, coronal, and sagittal, respectively. Note the mesenteric swirl (arrows in axial and coronal images) around the SMA (single arrowhead in axial and coronal images). This represents the posterior torsion of the small bowel mesentery as it courses into Waldeyer’s fossa toward the right retroperitoneum. The resulting dilated small bowel can be seen in the right upper quadrant. Also note the anterior course of the proximal transverse colon (three arrowheads in the sagittal cross-section) as it has been pushed toward the anterior abdomen due to the significant mass of dilated small bowel which is now posterior to its mesentery.