Lower Back Lesion in 52-Year-Old Patient

A 52-year-old man presents with a lesion of the lower back, and a biopsy is performed. What is your diagnosis?

A 52-year-old man presents with a lesion of the lower back, and a biopsy is performed.

Based on the image shown, what is your diagnosis?

A. Leiomyosarcoma

B. Mesenchymal chondrosarcoma

C. Schwannoma

D. Malignant triton tumor

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