Spinal MS was a term used for primary progressive MS but has not generally been used for the last 30 years or so. It was a good descriptor for this illness because the predominant symptoms were those of slowly progressive weakness and sensory problems, predominantly affecting the legs. In the past, it was especially difficult to distinguish from cervical spondylosis. Modern imaging has made this distinction much easier. For the sake of clarity, the term primary progressive MS is preferable.
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