Not officially as far as I am concerned. It all started about 5 years ago when I was diagnosed having spinal stenosis with nerve impingement L4-5. However, nerve conduction test showed nerve damage not related to the stenosis. I do not have diabetes, not overweight and have worked out usually 5 days a week for years. Had 80th birthday last week. Past 5 years, legs got weaker with numbness and tingling primarily in feet. Neurologist tested for all suspected possible causes. Cancer doctors and blood specialists did the same. Stenosis can cause these same feelings. Been to several physical therapist and two prominent spine surgeons, neither who suggested surgery. I have been a social drinker for many years. At the end of the day, they all suggest that must be the issue causing my situation. No one has told me of any test that is available to have an affirmation. One thing I mentioned to all the doctors is when this all started, I had a doctor who first treated my back pain with 3 separate steroid injections in L4-5 and S1. Each time the injections sent me off the table in initial pain. I have had those injections twice over the past 4 years and every doctor said they had never heard of that type of pain with the actual injections. After that, I was left with the numbness and tingling which led me down this 4 year journey. Thanks