Krabbe's disease with adult onset is rare; neurological symptoms begin
in childhood or at a juvenile age. Two brothers with adult onset of t
he disease are here reported; 1 sibling developed parapareto-ataxic ga
it while the other was asymptomatic. Magnetic resonance imaging showed
areas of demyelination in the white matter of the brain, while nerve
conduction was completely normal. In both patients deficiency of galac
tosylceramide beta-galactosidase was comparable to the infantile form.