Galactosylceramide: a reliable serum index of demyelination in multiple sclerosis.

Eight patients with multiple sclerosis were followed for several months to determine if serum levels of galactosylceramide, a major lipid component of myelin, correlate with the clinical evolution of the disease. In the patients with the chronic progressive form of multiple sclerosis, galactosylceramide remained undetectable. In the patients with relapsing-remitting multiple sclerosis, there was a good correlation between the elevation of serum galactosylceramide levels and clinical relapses. This serum assay should prove of value in the follow-up of patients with multiple sclerosis.