I'm seropositive -- AChR -- have had the test THREE times (three different docs). My first MRI, right after my bloodwork came back positive for MG, did NOT rule out MS -- they thought they might have seen some demyelination. My 2nd MRI, about 2 years later, didn't show much progression, if any. I've begun some tingling in my extremities -- which can be attributed to Topamax, so I'm telling myself that MG is still my ONLY autoimmune. But, I do know several MGers who also have MS.

Like Joanmarie, prednisone is NOT an option for me.