Mondo Description Metachromatic leukodystrophy (MLD) is a rare lysosomal storage disorder characterized byintralysosomal accumulation of sulfatides in various tissues, leading to progressive deterioration of motor and neurocognitive function.
Uniprot Description An autosomal recessive disease caused by abnormal intralysosomal accumulation of cerebroside-3-sulfate in central and peripheral nervous systems, as well as other organs. MLD is clinically characterized by leukodystrophy, progressive demyelination and a variety of neurological symptoms, including gait disturbances, ataxias, optical atrophy, dementia, seizures, and spastic tetraparesis. Decreased arylsulfatase A activity is detected in urine, leukocytes, and fibroblasts of affected individuals. Several forms of the disease can be distinguished according to the age at onset and disease severity: late infantile, juvenile and adult forms, partial cerebroside sulfate deficiency, and pseudoarylsulfatase A deficiency. Individuals with pseudoarylsulfatase A deficiency have low arylsulfatase A activity but lack neurological manifestations and are apparently healthy.
Disease Ontology Description A sphingolipidosis characterized by the accumulation of sulfatides in cells, especially the myelin producing cells of the nervous system.
Mondo Term and Equivalent IDs
MONDO:0018868: metachromatic leukodystrophy