Hi Brown owl-I know how frustrating it is. I think glowing means the lesion is new and active and would be causing current symptoms. I know when I had neuro issues that was what they were looking for on me. They said I could not be having the symptoms I was having and not have glowing lesions. Who knows, that was what I was told. It turned out I have Lyme, the lesions and symptoms can be very similar and the blood tests are inaccurate.
There are other things that cause lesions. Have your doctors considered those? I am not aware of the extensive list but maybe someone else here is. You can probably find it on the web somewhere.
How many Neuro's have you tried? Maybe another would have better direction or be able to dx you from current info. Most people have to go to more than 1 to get a dx. How about your local MS society?
Very best wishes and keep us posted. I am sure another person will have better info for you. Meanwhile, please try and stay los stress. I know it is really hard but it helps your health if you can.