Welcome to Neuro Talk. don't worry about protocal or anything else. Glad you found the site. I would definately write down all your questions regarding the anto sulfatide antibody test, and what that might mean for you, and just what it is he is looking for. You mentioned having a difficult time in walking. When I looked up this test, it is my understanding it is for neuro musclular problems. So don't be afraid just yet, but ask him directly, and if he thinks there is a problem. You won't know until you ask for sure. Look up this antibody test, but don't scare yourself, until you go find out exactly what this would mean in your case. We will be here for you for support. Many different conditions are brought to Neuro Talk. Keep asking questions. This is a good site, with alot of compassion no matter what the medical problem is. I will keep you in my thoughts and prayers. ginnie