I have already described in a previous post the reason that brought me here in terms of symptoms, so I won’t recapitulate them all, but basically I had since 3 months some serious sensory symptoms all around my body (e.g. burning, pin and needles, and 3 times sensations of water on the right leg), which all started after a rash on my chest looking like a shingle (which apparently wasn’t, according to my doctors); now these symptoms became less aggressive, but I still have some weird flat red spots that appear everyday on my chest/neck/shoulders, with some weird red spots that last about 30 minutes that sometime appear in cluster/patch on my body when I do some intense physical activity. Everything seems to have started with that rash, but it may not be connected to it. I had very low vitamin D as well when I checked myself after the symptoms (i.e. 12), and ANA tests are negative. My vitamin D have improved now (22), as well as my symptoms (quite significantly, but still sporadically there).
Anyway, I received my results yesterday from my evoked potential test (Somatosensory). I did three of them: 1) laser; 2) and two that were really similar in appearance, working with electrical impulses, but apparently testing different types of nerves. My neurologist told me that everything was normal, which meant according to her that both my peripheral and central nervous systems were fine/unaffected. She appeared to be quite convinced that I don’t have MS, but I will still have two MRI tests in one month; these were prescribed by another doctor.
I read on internet that evoked potential tests are abnormal in about 70 percent of people with MS (especially those who have a history of sensory symptoms), but I was wondering whether this figure sounds accurate or not? I also read that about 30-50 percent of people with MS have ANA positive blood tests. Has anyone heard of that?
My main question is: considering that I have had sensory symptoms all around my body for about 3 months now, how come can my evoked potential tests not notice anything wrong? Would someone with MS and sensory symptoms similar to mine would most likely test positive, or not necessarily?
Thank you very much in advance for your help wishing everyone a good day or evening!