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
• Primary renal Ewing
sarcoma/primitive neuroectodermal tumor
• Rhabdoid tumor
• Small cell carcinoma
• Wilms tumor, blastema predominant
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• Appropriate diagnosis
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