Orphanet: Metachromatic leukodystrophy
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Metachromatic leukodystrophy

Disease definition

A rare lysosomal disease characterized by accumulation of sulfatides in the central and peripheral nervous system due to deficiency of the enzyme arylsulfatase A, leading to demyelination. Three clinical subtypes can be distinguished based on the age of onset: late infantile, juvenile, and adult. Lead symptoms are deterioration in motor or cognitive function or behavioral problems, depending on the subtype, all eventually culminating in a decerebrated state and death after a highly variable disease course and duration. Mode of inheritance is autosomal recessive.

ORPHA:512

Classification level: Disorder
  • Synonym(s):
    • Arylsulfatase A deficiency
    • MLD
  • Prevalence: 1-9 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Childhood, Adolescent, Adult, Infancy
  • ICD-10: E75.2
  • OMIM: 156310  249900  250100
  • UMLS: C0023522  C2713319
  • MeSH: C538597  D007966
  • GARD: 3230
  • MedDRA: 10067609

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