The effect of intramuscular interferon beta-1a on spinal cord volume in relapsing-remitting multiple sclerosis.

Background Spinal cord atrophy occurs early in multiple sclerosis (MS) and impacts disability. The therapeutic effect of interferon beta-1a (IFNβ-1a) on spinal cord atrophy in patients with relapsing-remitting (RR) MS has not been explored.