Hi ~ Did you say that the spinal canal in the cervical area appears to be narrowing?? Even tho it seems impossible, it CAN affect areas in the lower/lumbar area. If a nerve is being impinged in the cervical area, it could possibly affect you in the lower area. I'm wondering if they're missing something.
The spine is a very delicate thing, as are the nerves. It doesn't take much to set things off. It's just a thought.
You might see how physical therapy would work. You'd be surprised how therapy can get things back in order again. It's worth a try!! God bless and best of luck!! Peace, Lee