Bronchiectasis in an asymptomatic infant with cystic fibrosis diagnosed following newborn screening

Many countries have introduced newborn screening for cystic fibrosis to facilitate diagnosis prior to the development of lung disease. Although most infants with cystic fibrosis are asymptomatic from a respiratory point of view at diagnosis, structural lung disease has been detected by computed tomography. We present a case of an asymptomatic infant with cystic fibrosis diagnosed following newborn screening who had endobronchial infection with Pseudomonas aeruginosa and radiological evidence of bronchiectasis at 3 months of age.