[Adult metachromatic leukodystrophy].

An adult case of metachromatic leukodystrophy confirmed by characteristic findings of the brain and superficial sural nerve biopsies, but with absence of deficiency of arylsulfatase A activity in the leucocytes, was reported. Ultrastructurally, typical membrane-bound inclusions were found in white matter and Schwann cells. The long course of thirty years and late onset of illness were discussed.