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An autosomal dominant congenital disorder affecting the skeletal muscles. Microscopically, it is characterized by disorganized areas, which are called cores, seen usually in the center of the muscle fibers. Clinically it presents as mild to severe muscle weakness. It may be associated with skeletal abnormalities including scoliosis, joint deformities, and hip dislocation.
Data assembled from 7 of 12 sources · Last updated Oct 3, 2026, 8:10 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Features include always present findings: Muscle weakness, Centrally nucleated skeletal muscle fibers, Delayed ability to walk, and Feeding difficulties and others; and very common findings: Weakness of facial musculature. 20 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Muscles | 10 | Weakness of facial musculature, Type 1 muscle fiber predominance, Muscle weakness |
Bones and joints | 3 | Skeletal muscle atrophy, Centrally nucleated skeletal muscle fibers, Sideways curvature of the spine (scoliosis) |
Pregnancy and birth | 2 | Congenital hip dislocation, Neonatal hypotonia |
Head and neck | 1 | Weakness of facial musculature |
Brain and nerves | 1 | Hyporeflexia |
Digestive system | 1 | Feeding difficulties |
Age of onset: newborn period.
RYR1 function has not been fully characterized.
Central core myopathy is associated with mutations in the RYR1 gene on chromosome 19.
Genetic testing for RYR1 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for central core myopathy has been reported in the published literature.
Phenotype severity distribution: 8 always present features, 1 very common feature, 3 common features.
Estimated prevalence: 1-9 in 1,000,000 (Rare).
3 clinical trials registered, 2 recruiting. Interventions under study include other interventions. Research is primarily sponsored by academic and government institutions.
31 publications have been identified in PubMed for central core myopathy. Research spans Basic Science / Preclinical (42%), Case Report / Case Series (23%), and Review / Meta-Analysis (13%).
Research Type | Count | % of Total |
|---|---|---|
Laboratory research | 13 | 42% |
Patient case studies | 7 | 23% |
Research summaries | 4 | 13% |
Disease patterns and progression | 3 | 10% |
Testing and diagnosis research | 2 | 6% |
New treatment approaches | 2 | 6% |
Yang YL (2026). [PMID: 42121846](https://pubmed.ncbi.nlm.nih.gov/42121846/). *Cells*. [Review / Meta-Analysis]
Filippi K (2026). [PMID: 41965903](https://pubmed.ncbi.nlm.nih.gov/41965903/). *Nat Commun*. [Basic Science / Preclinical]
Zhang Y (2026). [PMID: 41622502](https://pubmed.ncbi.nlm.nih.gov/41622502/). *Compr Physiol*. [Review / Meta-Analysis]
Zanotti S (2026). [PMID: 41851258](https://pubmed.ncbi.nlm.nih.gov/41851258/). *Eur J Hum Genet*. [Gene Therapy / Novel Therapeutics]
Johari M (2026). [PMID: 41678358](https://pubmed.ncbi.nlm.nih.gov/41678358/). *Brain*. [Basic Science / Preclinical]
Yang J (2026). [PMID: 42062698](https://pubmed.ncbi.nlm.nih.gov/42062698/). *Clin Rheumatol*. [Diagnostic / Biomarker]
Kong F (2026). [PMID: 41379555](https://pubmed.ncbi.nlm.nih.gov/41379555/). *JCI Insight*. [Basic Science / Preclinical]
Granton D (2026). [PMID: 41906154](https://pubmed.ncbi.nlm.nih.gov/41906154/). *Crit Care*. [Epidemiology / Natural History]
Ibrahim F (2025). [PMID: 41209931](https://pubmed.ncbi.nlm.nih.gov/41209931/). *Cureus*. [Case Report / Case Series]
Vignard V (2025). [PMID: 40840166](https://pubmed.ncbi.nlm.nih.gov/40840166/). *EBioMedicine*. [Case Report / Case Series]