Welcome to Neuro Talk. Leesa is the best at helping with the MRI results. I can tell you however, anytime there are words like "Moderately Severe" or "complete Loss" or even" loss of the signal," that is a reason for concern. No matter what the Neruologist says to do, Make sure you go for a second opinion, even a third. Surgery is a last option, and should only be considered when all conservative methods have been tried. I know you are scared, believe me I was too when I came to Neuro Talk. I have had two spinal fusions. NT, got me through them with lots of support. keep a journal of your symptoms to give to your doctors. Yes the pins and needle feelings in the arms can be a result of this kind of problem in your spine. Just don't panic yet, and get that second opinion. You will get good information here, and help no matter what the prognosis. I do wish you all the best, and a good resolution. I will help in any way I can. ginnie