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Cap myopathy is a very rare congenital myopathy presenting a weakness of facial and respiratory muscles associated with craniofacial and thoracic deformities, as well as weakness of limb proximal and distal muscles. Onset is at birth or in childhood, weakness progression is slow but may lead to a severe and even fatal prognosis.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for cap myopathy.
1 publication has been identified in PubMed for cap myopathy. Research spans Case Report / Case Series (100%).
Vaid M (2025). [PMID: 41458778](https://pubmed.ncbi.nlm.nih.gov/41458778/). *Cureus*. [Case Report / Case Series]
Data assembled from 3 of 12 sources · Last updated Sep 17, 2026, 10:23 PM UTC
European rare disease database
Genetic and Rare Diseases Info Center