In actuality, you may well have neuropathy FROM the lumbar stenosis.

Neuropathy just refers to a disorder of nerves. Peripheral neuropathy is usually the term used if the nerve damage comes from some systemic situation. but neuropathy can come from injury damage, or compression from bulging/herniated discs or arthritic bone spurring in the spine. If this affects the spinal cord it is usually not referred to as neuropathy, but if it impacts the nerve roots that exit from the spine it can be--and the specific name for that is radiculopathy (radic is Latin for "root").

In any case, since the symptoms of nerve compromise can be exactly the same whether the spine or other non-spinal nerves are being damaged, being able to tell from imaging just which nerves are being impacted should help you to develop a treatment regimen.

And--there is nothing that says you couldn't have both spinal compromise and damage to more peripheral nerves at the same time, with symptoms from both adding up to to more than the sum of the respective parts--the so called "double-crush phenomenon" (which probably happens more often than is diagnosed).