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GTR Home > Conditions/Phenotypes > Pontocerebellar hypoplasia type 4

Pontocerebellar hypoplasia type 4

Synonyms
Encephalopathy fatal infantile with olivopontocerebellar hypoplasia; TSEN54-Related Pontocerebellar Hypoplasia
Modes of inheritance
Autosomal recessive inheritance (Orphanet)

Summary

Excerpted from the GeneReview: TSEN54 Pontocerebellar Hypoplasia
TSEN54 pontocerebellar hypoplasia (TSEN54-PCH) comprises three PCH phenotypes (PCH2, 4, and 5) that share characteristic neuroradiologic and neurologic findings. The three PCH phenotypes (which differ mainly in life expectancy) were considered to be distinct entities before their molecular basis was known. PCH2. Children usually succumb before age ten years (those with PCH4 and 5 usually succumb as neonates). Children with PCH2 have generalized clonus, uncoordinated sucking and swallowing, impaired cognitive development, lack of voluntary motor development, cortical blindness, and an increased risk for rhabdomyolysis during severe infections. Epilepsy is present in approximately 50%. PCH4. Neonates often have seizures, multiple joint contractures ("arthrogryposis"), generalized clonus, and central respiratory impairment. PCH5 resembles PCH4 and has been described in one family.
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:
Tessa van Dijk
Frank Baas
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Available tests

43 tests are in the database for this condition.

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Clinical tests (43 available)

Molecular Genetics Tests

Genes See tests for all associated and related genes

  • Also known as: PCH2A, PCH4, PCH5, SEN54L, sen54, TSEN54
    Summary: tRNA splicing endonuclease subunit 54

Clinical features

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Imported from Human Phenotype Ontology (HPO)

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