Dr. Zuzana Kos

Resident PGY4

Case Three

Overview

Clinical history: This 67-year-old woman had previous back surgery, including decompression and fusion of L4 to S1 secondary to a grade III spondylolisthesis.  Several years later she presented with a mildly tender mass at the site of her previous lumbar surgery.  An excisional biopsy was performed, seen here.

What is the diagnosis? What is the cause?


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