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GTR Home > Conditions/Phenotypes > Hypomyelinating leukodystrophy 6

Hypomyelinating leukodystrophy 6

Synonyms
LEUKODYSTROPHY, HYPOMYELINATING, WITH ATROPHY OF THE BASAL GANGLIA AND CEREBELLUM; TUBB4A-Associated Leukodystrophy
Modes of inheritance
Autosomal dominant inheritance (Orphanet)

Summary

Excerpted from the GeneReview: TUBB4A-Related Leukodystrophy
TUBB4A-related leukodystrophy comprises a phenotypic spectrum in which the MRI findings range from hypomyelination with atrophy of the basal ganglia and cerebellum (H-ABC) at the severe end to isolated hypomyelination at the mild end. Progressive neurologic findings reflect involvement of the pyramidal tracts (spasticity, brisk deep tendon reflexes, and Babinski sign), extrapyramidal system (rigidity, dystonia, choreoathetosis, oculogyric crisis, and perioral dyskinesia), cerebellum (ataxia, intention tremor, dysmetria), and bulbar function (dysarthria, dysphonia, and swallowing). Cognition is variably affected, usually less severely than motor function. Typically, those with H-ABC present in early childhood (ages 1-3 years) and those with isolated hypomyelination in later childhood or adulthood. The rate of progression varies with disease severity.
Full text of GeneReview (by section):
Summary
GeneReview Scope
Diagnosis
Clinical Characteristics
Genetically Related (Allelic) Disorders
Differential Diagnosis
Management
Genetic Counseling
Resources
Molecular Genetics
Chapter Notes
References
Authors:
Norah Nahhas
Alex Conant
Eline Hamilton
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Available tests

25 tests are in the database for this condition.

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Clinical tests (25 available)

Molecular Genetics Tests

Genes See tests for all associated and related genes

  • Also known as: DYT4, TUBB4, beta-5, TUBB4A
    Summary: tubulin beta 4A class IVa

Clinical features

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Imported from Human Phenotype Ontology (HPO)

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Reviews

Clinical resources

Practice guidelines

  • AAP, 2021
    Leukodystrophies in Children: Diagnosis, Care, and Treatment, Pediatrics (2021) 148 (3): e2021053126.

Molecular resources

Consumer resources

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