Background
A 44-year-old man is referred for neurosurgical evaluation secondary
to a 6-month history of progressive bilateral lower extremity numbness
and weakness. Additionally, he reports a history of back pain over the
past 4 years that he describes as an occasional sharp shooting pain down
his right thigh. The only medication that he has taken is ibuprofen for
pain relief. His surgical history only includes an appendectomy at 14
years of age. He denies tobacco, alcohol, or illicit drug use.
| Figure 1 |

