Pathogenic variants in the ryanodine receptor 1 () gene are causative for a wide spectrum of muscular phenotypes, ranging from malignant hyperthermia over mild, non-progressive to severe congenital myopathy. Both autosomal dominant and recessive inheritance can occur, with the more severe forms usually showing recessive inheritance. However, genotype-phenotype correlations are complicated due to the large size of the gene and heterogeneous phenotypes.
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