How are primary progressive multiple sclerosis (MS) (PPMS) and progressive-relapsing multiple sclerosis (PRMS) characterized?

Updated: Oct 08, 2019
  • Author: Christopher Luzzio, MD; Chief Editor: Jasvinder Chawla, MD, MBA  more...
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In PPMS, which accounts for approximately 10% of MS cases, function declines steadily without relapses. In PRMS, which accounts for fewer than 5% of patients with MS, occasional relapses are superimposed on progressive disease.

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