The diagnosis of multiple sclerosis (MS) is distressing, and the prognosis is often very uncertain. It is encouraging to know that 5-40% of those diagnosed will have "benign MS" with only minimal disability 10 years after diagnosis.
In this cohort of 436 patients diagnosed with MS in 1985, 10% had the wrong diagnosis and just over 10% had benign MS. Benign MS is more likely if you are:
Free of motor symptoms at presentation
Source: Journal of Neurology, Neurosurgery, and Psychiatry 2008;79:1245-1248