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DOI: 10.1148/rg.242035070
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Best Cases from the AFIP

Cystic Nephroma1

John K. Hopkins, MB, BCh, BAO, Henry W. Giles, Jr, MD, Josephine Wyatt-Ashmead, MD and Steven A. Bigler, MD

1 From the Departments of Radiology (J.K.H., H.W.G.) and Pathology (J.W.A., S.A.B.), University of Mississippi Medical Center, 2500 N State St, Jackson, MS 39216. Received March 14, 2003; revision requested April 16 and received May 21; accepted May 27. All authors have no financial relationships to disclose. Address correspondence to J.K.H. (e-mail: jhopkins@jam.rr.com).



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  		Figure 1a. (a) Axial contrast-enhanced abdominal CT scan demonstrates a low-attenuation right renal mass with thin septa. (b) CT scan shows multiple cysts that have herniated into the renal pelvis and ureter (arrow). Note the thin lateral "claw" of enhancing renal parenchyma.

 


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  		Figure 1b. (a) Axial contrast-enhanced abdominal CT scan demonstrates a low-attenuation right renal mass with thin septa. (b) CT scan shows multiple cysts that have herniated into the renal pelvis and ureter (arrow). Note the thin lateral "claw" of enhancing renal parenchyma.

 


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  		Figure 2a. (a) Transverse US image of the right renal fossa shows a multicystic mass with thin, echogenic septa in the proximal ureter (arrow). (b) Transverse US image shows mild hydronephrosis (arrow) due to mass effect and ureteral obstruction.

 


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  		Figure 2b. (a) Transverse US image of the right renal fossa shows a multicystic mass with thin, echogenic septa in the proximal ureter (arrow). (b) Transverse US image shows mild hydronephrosis (arrow) due to mass effect and ureteral obstruction.

 


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  		Figure 3. Photograph of the cut specimen shows multiple smooth-walled cysts separated by thin, transparent septa. Note the hemorrhagic-necrotic cysts that have herniated into the proximal ureter (arrow).

 


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  		Figure 4. High-power photomicrograph (original magnification, x400; hematoxylin-eosin stain) shows cuboidal epithelial cells lining the cysts.

 


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  		Figure 5. Lower-power photomicrograph (original magnification, x150; hematoxylin-eosin stain) shows multiple cystic spaces with fibrous tissue septa.

 




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