College of American Pathologists

2012 — April Case of the Month

Posted April 17, 2012


CAP Foundation April Online Case of the Month

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A 48-year-old woman presented with flank pain. Imaging studies revealed a multicystic lesion of the right kidney suspicious for renal cell carcinoma. A nephrectomy was performed. The resected 754 g kidney contained a 12.5 x 12.0 x 9.0 cm multiloculated cystic mass with focal white solid nodules, grossly abutting the renal pelvis but apparently confined to the kidney.

The master list with the correct answer

  • Angiomyolipoma
  • Cystic partially differentiated nephroblastoma
  • Metanephric adenofibroma
  • Mixed epithelial and stromal tumor
  • Multilocular cystic renal cell carcinoma
  • Solitary fibrous tumor

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  • Appropriate diagnosis
  • Critique
  • References

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