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Neuronopathy, distal hereditary motor, autosomal dominant 8

Synonyms
Autosomal dominant congenital benign spinal muscular atrophy; Distal spinal muscular atrophy, congenital nonprogressive; NEURONOPATHY, DISTAL HEREDITARY MOTOR, TYPE VIII; NEUROPATHY, DISTAL HEREDITARY MOTOR, TYPE VIII; SPINAL MUSCULAR ATROPHY, CONGENITAL BENIGN, WITH CONTRACTURES
Modes of inheritance
Autosomal dominant inheritance (Orphanet)

Summary

Excerpted from the GeneReview: Autosomal Dominant TRPV4 Disorders
The autosomal dominant TRPV4 disorders (previously considered to be clinically distinct phenotypes before their molecular basis was discovered) are now grouped into neuromuscular disorders and skeletal dysplasias; however, the overlap within each group is considerable. Affected individuals typically have either neuromuscular or skeletal manifestations alone, and in only rare instances an overlap syndrome has been reported. The three autosomal dominant neuromuscular disorders (mildest to most severe) are: Charcot-Marie-Tooth disease type 2C. Scapuloperoneal spinal muscular atrophy. Congenital distal spinal muscular atrophy. The autosomal dominant neuromuscular disorders are characterized by a congenital-onset, static, or later-onset progressive peripheral neuropathy with variable combinations of laryngeal dysfunction (i.e., vocal fold paresis), respiratory dysfunction, and joint contractures. The six autosomal dominant skeletal dysplasias (mildest to most severe) are: Familial digital arthropathy-brachydactyly. Autosomal dominant brachyolmia. Spondylometaphyseal dysplasia, Kozlowski type. Spondyloepiphyseal dysplasia, Maroteaux type. Parastremmatic dysplasia. Metatropic dysplasia. The skeletal dysplasia is characterized by brachydactyly (in all 6); the five that are more severe have short stature that varies from mild to severe with progressive spinal deformity and involvement of the long bones and pelvis. In the mildest of the autosomal dominant TRPV4 disorders life span is normal; in the most severe it is shortened. Bilateral progressive sensorineural hearing loss (SNHL) can occur with both autosomal dominant neuromuscular disorders and skeletal dysplasias.
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:
Brett A McCray
Alice Schindler
Julie E Hoover-Fong
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Available tests

41 tests are in the database for this condition.

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Clinical tests (41 available)

Molecular Genetics Tests

Genes See tests for all associated and related genes

  • Also known as: BCYM3, CMT2C, HMSN2C, OTRPC4, SMAL, SPSMA, SSQTL1, TRP12, VRL2, VROAC, TRPV4
    Summary: transient receptor potential cation channel subfamily V member 4

Clinical features

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Imported from Human Phenotype Ontology (HPO)

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