We describe a family with hereditary adult-onset leukodystrophy with s
paring of the optic radiations, shown clinically, neuroradiologically
and electrophysiologically. All five affected members developed their
leukodystrophy in their fourth decade and clinical features steadily p
rogressed. The sparing of the optic radiations is not typical of other
leukodystrophies. We suggest that this is a new clinical entity.