College of American Pathologists

2013 — May Case of the Month

Posted May 21, 2013


CAP Foundation Online Case of the Month

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A 4-year-old boy presented with abdominal pain following a fall on the playground, and was found to have a large retroperitoneal mass arising from the left kidney. Left nephrectomy and lymph node sampling were performed. The 535 g kidney showed a 10.0 cm soft pale tan mass in the upper pole associated with subcapsular hemorrhage. All lymph nodes were negative for tumor.

The master list with the correct answer

  • Clear cell sarcoma of the kidney
  • Cystic partially differentiated nephroblastoma
  • Malignant rhabdoid tumor
  • Mesoblastic nephroma
  • Renal cell carcinoma
  • Wilms tumor, favorable histology
  • Wilms tumor, unfavorable histology

Access Case Critique to view:

  • Appropriate diagnosis
  • Critique
  • References

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