EURORAD ESR

Case 2523

Xanthogranulomatous pyelonephritis presenting as a diffuse retroperitoneal process: CT and MRI findings

Author(s)
Kanellou B, Katsiva V, *Kollaitis G, *Labou Ch, Tibishrani M
 
Patient
male, 42 year(s)
 
 
  • Figure 1
    Pain film of the abdomen

    A KUB film showing staghorn calculi and no renal parenchyma outline on the right.

     
    Area of Interest: unknown; Imaging Technique: Pain film of the abdomen;
     
     
  • Figure 2
    An axial non-contrast CT scan

    An axial non-contrast CT scan at the level of the lower pole of the left kidney. Pelvicalyceal staghorn calculi are evident. They are surrounded by extensive fatty process totally replacing the renal parenchyma...

     
    Area of Interest: unknown; Imaging Technique: Axial non contrast CT scan;
     
     
  • Figure 3
    Axial contrast CT scans
     

    An axial contrast CT scan at superior level.The soft tissue extends from the upper pole of the right kidney, fills throughout the retroperitoneal space and contains multiple cystic spaces of various sizes. There is a...

     
    Area of Interest: unknown; Imaging Technique: Axial contrast CT scans;

    An axial contrast CT scan at superior level.The soft tissue extends from the upper pole of the right kidney, fills throughout the retroperitoneal space and contains multiple cystic spaces of various sizes. There is a...

     
    Area of Interest: unknown; Imaging Technique: Axial contrast CT scans;
     
     
  • Figure 4
    MR Imaging
     

    A T1 weighted image showing the residual parenchyma surrounding the staghorn calculi and confirms the fatty consistency of the previously described process.

     
    Area of Interest: unknown; Imaging Technique: MR Imaging;

    TSE-T2 weighted image with fat suppression showing the cystic space containing fluid--fluid level due to the presence of debris.

     
    Area of Interest: unknown; Imaging Technique: MR Imaging;

    TSE-T2 weighted image showing that the residual and the retroperitoneal soft tissue had low signal.

     
    Area of Interest: unknown; Imaging Technique: MR Imaging;
     
     
A KUB film showing staghorn calculi and no renal parenchyma outline on the right.
 
An axial non-contrast CT scan at the level of the lower pole of the left kidney. Pelvicalyceal staghorn calculi are evident. They are surrounded by extensive fatty process totally replacing the renal parenchyma assuming reny form morphology. Extensive soft tissue infiltrates the psoas muscle, the posterior pararenal space and the adjacent abdominal wall.
 
An axial contrast CT scan at superior level.The soft tissue extends from the upper pole of the right kidney, fills throughout the retroperitoneal space and contains multiple cystic spaces of various sizes. There is a slight enhancement of the process.
 
An axial contrast CT scan at superior level.The soft tissue extends from the upper pole of the right kidney, fills throughout the retroperitoneal space and contains multiple cystic spaces of various sizes. There is a slight enhancement of the process.
 
A T1 weighted image showing the residual parenchyma surrounding the staghorn calculi and confirms the fatty consistency of the previously described process.
 
TSE-T2 weighted image with fat suppression showing the cystic space containing fluid--fluid level due to the presence of debris.
 
TSE-T2 weighted image showing that the residual and the retroperitoneal soft tissue had low signal.
 
 
 
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