College of American Pathologists

2013 — December Case of the Month

Posted December 10, 2013


CAP Foundation Online Case of the Month

Click Slide Image to View Case with DigitalScope

A 33-year-old man presented with left-sided flank pain. CT scan revealed a mass in the upper pole of the left kidney. The nephrectomy specimen showed a 7.1 cm well-circumscribed, tan-yellow, friable tumor mass.

The master list with the correct answer

  • Clear cell sarcoma
  • Desmoplastic small round cell tumor
  • Lymphoblastic lymphoma
  • Monophasic synovial sarcoma
  • Neuroblastoma
  • Primary renal Ewing
     sarcoma/primitive neuroectodermal tumor

  • Rhabdoid tumor
  • Rhabdomyosarcoma
  • Small cell carcinoma
  • Wilms tumor, blastema predominant

Access Case Critique to view:

  • Appropriate diagnosis
  • Critique
  • References

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