Cystic fibrosis (CF) (ORPHA: 586; OMIM: 219700) is a rare autosomal recessive genetic disease caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene located on chromosome 7q31.2 (OMIM, 602421) [1]. The gene discussed is CFTR; the disease is cystic fibrosis.