Mass Discovered in Kidney of 58-Year-Old Patient

A 58-year-old man presents with a left kidney mass. What is your diagnosis?

A 58-year-old man presents with a left kidney mass.

What is your diagnosis?

A. Leiomyosarcoma

B. Sarcomatoid carcinoma

C. Fibrosarcoma

D. Primitive neuroectodermal tumor

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