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Pathology for Urologists

Retroperitoneal Cysts


Image A
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Image B
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  • Benign retroperitoneal cysts are usually mesothelial or mesonephric in origin; rarely, rupture of the biliary tree can result in bile-filled cysts.
  • Gross: by definition, these cysts are not connected to the kidney or adrenal; usually filled with clear or straw-colored fluid (image A).
  • Histology: these cystic structures may be lined by mesothelial, enteric (glandular), or columnar epithelium (image B).

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