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An inherited muscular dystrophy caused by mutations in the SEPN1 gene. It is characterized by severe limitation in flexion of the dorsolumbar and cervical spine, due to contracture of the spinal extensors. It leads to loss of movement of the spine and the thoracic cage.
Features include always present findings: Increased endomysial connective tissue, Type 1 muscle fiber predominance, Neck flexor weakness, and Centrally nucleated skeletal muscle fibers and others; and very common findings: Decreased body weight, Facial palsy, Short stature, and Failure to thrive and others. 33 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Muscles | 13 | Flexion contracture, Low muscle tone (hypotonia), Generalized hypotonia |
Brain and nerves | 3 | Spinal rigidity, Intellectual disability, Hypernasal speech |
Head and neck | 2 | Facial palsy, High palate |
Growth and development | 2 | Short stature, Failure to thrive |
Lungs and breathing | 2 | Nocturnal hypoventilation, Restrictive ventilatory defect |
Bones and joints | 2 | Centrally nucleated skeletal muscle fibers, Sideways curvature of the spine (scoliosis) |
SELENON function has not been fully characterized.
Rigid spine muscular dystrophy 1 is associated with mutations in the SELENON gene on chromosome 1.
Genetic testing for SELENON is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for rigid spine muscular dystrophy 1 has been reported in the published literature.
Phenotype severity distribution: 6 always present features, 5 very common features, 3 common features.
No clinical trials have been registered for rigid spine muscular dystrophy 1.
15 publications have been identified in PubMed for rigid spine muscular dystrophy 1. Research spans Epidemiology / Natural History (42%), Case Report / Case Series (33%), and Basic Science / Preclinical (17%).
Research Type | Count | % of Total |
|---|---|---|
Disease patterns and progression | 5 | 42% |
Patient case studies | 4 | 33% |
Laboratory research | 2 | 17% |
Testing and diagnosis research | 1 | 8% |
Xiao J (2026). [PMID: 41645291](https://pubmed.ncbi.nlm.nih.gov/41645291/). *Orphanet J Rare Dis*. [Epidemiology / Natural History]
Okal FM (2026). [PMID: 41728585](https://pubmed.ncbi.nlm.nih.gov/41728585/). *Cureus*. [Case Report / Case Series]
Risi B (2025). [PMID: 39980054](https://pubmed.ncbi.nlm.nih.gov/39980054/). *J Med Case Rep*. [Case Report / Case Series]
Dofash LNH (2025). [PMID: 39531736](https://pubmed.ncbi.nlm.nih.gov/39531736/). *Brain*. [Basic Science / Preclinical]
Liu C (2025). [PMID: 39671077](https://pubmed.ncbi.nlm.nih.gov/39671077/). *Inflammation*. [Epidemiology / Natural History]
Barraza-Flores P (2025). [PMID: 40087793](https://pubmed.ncbi.nlm.nih.gov/40087793/). *Skelet Muscle*. [Basic Science / Preclinical]
de Laat ECM (2024). [PMID: 39443859](https://pubmed.ncbi.nlm.nih.gov/39443859/). *BMC Neurol*. [Epidemiology / Natural History]
Liu C (2024). [PMID: 38376705](https://pubmed.ncbi.nlm.nih.gov/38376705/). *Immunol Res*. [Epidemiology / Natural History]
Alwakaa O (2024). [PMID: 40012600](https://pubmed.ncbi.nlm.nih.gov/40012600/). *Brain Circ*. [Case Report / Case Series]
Savani S (2024). [PMID: 39077244](https://pubmed.ncbi.nlm.nih.gov/39077244/). *Cureus*. [Case Report / Case Series]
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 8:41 AM UTC
Online Mendelian Inheritance in Man