Lower Back Lesion in 52-Year-Old Patient

Poll

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