Congenital Myopathy 18, also known as myopathy, congenital, due to dihydropyridine receptor defect, is related to kearns-sayre syndrome and congenital myopathy. An important gene associated with Congenital Myopathy 18 is CACNA1S (Calcium Voltage-Gated Channel Subunit Alpha1 S). Affiliated tissues include skeletal muscle, and related phenotypes are high palate and hypotonia