Treatable Intellectual Disability

l.o. Metachromatic Leukodystrophy

BIOCHEMICAL DEFECT

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DIAGNOSIS

Gene
ARSA (AR)

Diagnostic Test
Arylsulfatase-A Enzyme Activity

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SIGNS & SYMPTOMS

Neurological
Dementia, psychosis/(manic-)depression, behavioral disturbances, spasticity, neuropathy

Non-Neurological
- - -

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THERAPY

Treatment
Haematopoietic Stemcell Transplantation

Level of Evidence
4-5

Clinical Practice
Individual Basis

Treatment Effect
Stabilizes clinical deterioration



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l.o. Metachromatic Leukodystrophy

Late-Onset Metachromatic Leukodystrophy

Metachromatic leukodystrophy is a neurodegenerative disease characterised by an accumulation of sulfatides in the nervous system. Patients with late infantile onset develop progressive difficulties in locomotion at around 14 months of age caused by a combination of peripheral neuropathy and progressive spasticity. Decline in cognitive function, and blindness due to optic atrophy are followed by a vegetative state and death. In juvenile and adult patients the first and predominant presentation is deterioration of mental functions, behavioural problems i and psychiatric disease accompanied by various combinations of movement disorders such as ataxia, dystonia and spasticity.. The MRI shows characteristic bilateral changes of central white matter with diffuse T2 Hyperintensity. CSF protein content is constantly elevated in the late infantile form.

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