Congenital Myopathy 1a, Autosomal Dominant, with Malignant Hyperthermia, also known as congenital myopathy 1a, autosomal dominant, with susceptibility to malignant hyperthermia, is related to king-denborough syndrome and congenital myopathy 1b, autosomal recessive, and has symptoms including generalized muscle weakness An important gene associated with Congenital Myopathy 1a, Autosomal Dominant, with Malignant Hyperthermia is RYR1 (Ryanodine Receptor 1). Affiliated tissues include skeletal muscle and skin, and related phenotypes are facial palsy and neonatal hypotonia