Congenital Myopathy 13, also known as native american myopathy, is related to congenital myopathy and malignant hyperthermia susceptibility. An important gene associated with Congenital Myopathy 13 is STAC3 (SH3 And Cysteine Rich Domain 3), and among its related pathways/superpathways are Myometrial relaxation and contraction pathways and Presenilin-Mediated Signaling. Affiliated tissues include skeletal muscle, and related phenotypes are muscle weakness and myopathic facies