PMC3198615_01
Gastrointestinal series with small bowel imaging. (a) Scout film showing Double-J Stent orthotopic in the left-sided renal collecting system (arrow). (b) Barium contrast media was injected through nasogastric tube under fluoroscopic evaluation. The proximal small bowel demonstrates intermittent mild dilatation. Obstructive point was not clearly identified. (c) Higher magnification.
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fig1
The terminal ileum was normal in appearance (Figure 1).
CT scan of the abdomen and pelvis. (a) Imaging without i.v. contrast. Stranding and thickening of the soft tissue immediately below the lower pole of the left kidney and around the splenic flexure. (b) Imaging after i.v. contrast application. Stranding and thickening of the soft tissue around the kidney appears more prominent (arrow).
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fig2
The nephroureteral stent was noted on the left side in stable position (Figure 2). 
Histopathological examination. (a) Pathology slide demonstrating the poorly differentiated carcinoma of the colon (Hematoxylin and Eosin, 20x). Immunohistochemical stains for CK20 and CK7 were found to be uniformly CK20 positive (b) and CK7 negative (c).
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fig3
Immunohistochemical stains for CK20 and CK7 were performed and found to be uniformly CK20 positive and CK7 negative (Figure 3).