Clinical symptoms of adult metachromatic leukodystrophy and arylsulfatase A pseudodeficiency.

OBJECTIVE To determine the clinical symptoms in adult metachromatic leukodystrophy and in adult pseudodeficiency for arylsulfatase A. DESIGN Case series. SETTING University hospital. PATIENTS Twenty-five adult patients with very low arylsulfatase A activity. RESULTS In 13 patients, a diagnosis of adult metachromatic leukodystrophy was made. The main symptoms were dementia, behavioral abnormalities, ataxia, and polyneuropathy. In 12 patients, a diagnosis of arylsulfatase A pseudodeficiency was made. No characteristic clinical syndrome could be detected in these patients. CONCLUSIONS Adult metachromatic leukodystrophy is a progressive metabolic disease with symptoms of demyelination of the central and peripheral nervous systems. Diagnosis must be confirmed by determination of arylsulfatase A activity and accumulation of sulfatides. Pseudodeficiency for arylsulfatase A can be confirmed or excluded by means of DNA analysis.

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