Hi Frank . My neuro told me that spinal lesions are very difficult to detect, he's been a well-respected MS specialist for 30 years. So, I guess, sometimes you can have spinal lesions and they just aren't visible on the mri. That could explain your right-side problems maybe? I try not to pay too much attention to my mri's because it would drive me nuts tryin' to make sense of it all . MS just doesn't behave in a sensible way, IMO .