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Features include always present findings: Motor delay, Increased endomysial connective tissue, Motor axonal neuropathy, and Decreased number of peripheral myelinated nerve fibers and others; and very common findings: Distal muscle weakness and Skeletal muscle atrophy. 24 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Muscles | 5 | Low muscle tone (hypotonia), Distal muscle weakness, Proximal muscle weakness |
VRK1 function has not been fully characterized.
Neuronopathy, distal hereditary motor, autosomal recessive 10 is associated with mutations in the VRK1 gene on chromosome 14.
Genetic testing for VRK1 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 5 always present features, 2 very common features, 6 common features.
Data assembled from 4 of 12 sources · Last updated Sep 20, 2026, 4:03 AM UTC
Online Mendelian Inheritance in Man
Brain and nerves | 5 | Sensory axonal neuropathy, Motor axonal neuropathy, Overactive reflexes (hyperreflexia) |
Bones and joints | 2 | Skeletal muscle atrophy, Sideways curvature of the spine (scoliosis) |
Lab test results | 1 | Elevated creatine kinase (muscle enzyme) (elevated circulating creatine kinase concentration) |
Eyes | 1 | Nystagmus |
Head and neck | 1 | Microcephaly |