Description : Formerly known as cystic fibrosis of the pancreas, this entity has increasingly been
labeled simply 'cystic fibrosis.' Manifestations relate not only to the disruption
of exocrine function of the pancreas but also to intestinal glands (meconium ileus),
biliary tree (biliary cirrhosis), bronchial glands (chronic bronchopulmonary infection
with emphysema), and sweat glands (high sweat electrolyte with depletion in a hot
environment). Infertility occurs in males and females. For discussion of a phenotype
consisting of bronchiectasis with or without elevated sweat chloride caused by mutation
in the genes encoding the 3 subunits of the epithelial sodium channel, see BESC1 (211400).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutations in the cystic fibrosis transmembrane conductance regulator gene
(CFTR, 602421.0001);
Laboratory abnormalities : High sweat sodium and chloride; Hyponatremic dehydration, rarely; Hypercalciuria; Abnormal nasal potential differences; High newborn serum levels of immunoreactive trypsinogen;