Myasthenic Syndrome, Congenital, 22, also known as congenital myasthenic syndrome 22, is related to cystinuria and congenital myasthenic syndrome. An important gene associated with Myasthenic Syndrome, Congenital, 22 is PREPL (Prolyl Endopeptidase Like). The drugs Sulfamethoxazole and Anti-Infective Agents have been mentioned in the context of this disorder. Affiliated tissues include uterus, and related phenotypes are ptosis and hypotonia