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Congenital muscular dystrophy with hyperlaxity is a rare, genetic neuromuscular disease characterized by congenital hypotonia, generalized, slowly progressive muscular weakness, and proximal joint contractures with distal joint hypermobility and hyperlaxity. Scoliosis or rigidity of the spine and delayed motor milestones are also frequently reported. Other manifestations include a long myopathic face and, in rare cases, respiratory failure, mild to moderate intellectual deficiency and short stature. Ambulation may be impaired with time.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for congenital muscular dystrophy with hyperlaxity.
3 publications have been identified in PubMed for congenital muscular dystrophy with hyperlaxity. Research spans Case Report / Case Series (100%).
McCarty RM (2025). [PMID: 39923201](https://pubmed.ncbi.nlm.nih.gov/39923201/). *Ann Clin Transl Neurol*. [Case Report / Case Series]
Maiga AB (2024). [PMID: 39523858](https://pubmed.ncbi.nlm.nih.gov/39523858/). *Mol Genet Genomic Med*. [Case Report / Case Series]
İpek R (2024). [PMID: 39129837](https://pubmed.ncbi.nlm.nih.gov/39129837/). *Mol Syndromol*. [Case Report / Case Series]
Data assembled from 3 of 12 sources · Last updated Sep 20, 2026, 8:41 AM UTC
European rare disease database
Genetic and Rare Diseases Info Center