Have you had a MRI of the lumbar spine?
no, the pain specialist did some x-rays to make sure there wasn't a slipped disc then an EMG? ithink that's what it was called. He used a probe like wire attached to electric current. then he ran it up and down both of my legs. that's the only other procedure prior to the nerve numbing procedure.
I would want to discuss with your doctor about getting a lumbar spine MRI, as this would help to diagnose one common reason for pain radiating down the leg -- a herniated disc "pinching" a nerve in the lower back.
Your symptoms sound like lumbar radiculopathy:
and the MRI is a much better test than a xray to evaluate this.
I'm not sure what they are referring to as "Frachetes" disease.