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An autosomal recessive cerebellar ataxia that has material basis in homozygous or compound heterozygous mutation in the SCYL1 gene on chromosome 11q13.
Features include always present findings: Gait ataxia, Stuttering, Enlarged liver (hepatomegaly), and Distal muscle weakness and others; and common findings: Mild intellectual disability, Liver scarring (fibrosis) (hepatic fibrosis), Motor delay, and Distal sensory impairment and others. 23 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 10 | Mild intellectual disability, Gait ataxia, Stuttering |
SCYL1 function has not been fully characterized.
Acute infantile liver failure-cerebellar ataxia-peripheral sensory motor neuropathy syndrome is associated with mutations in the SCYL1 gene on chromosome 11.
Genetic testing for SCYL1 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 9 always present features, 11 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
Data assembled from 5 of 12 sources · Last updated Sep 21, 2026, 1:31 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about acute infantile liver failure-cerebellar ataxia-peripheral sensory motor neuropathy syndrome
Digestive system | 5 | Hepatic failure, Liver scarring (fibrosis) (hepatic fibrosis), Enlarged liver (hepatomegaly) |
Muscles | 4 | Distal muscle weakness, Frequent falls, Cerebellar vermis atrophy |
Blood and immune system | 1 | Enlarged spleen (splenomegaly) |
Bones and joints | 1 | Skeletal muscle atrophy |
Arms and legs | 1 | Limb ataxia |