title: Adult diagnosis of Swyer-James-MacLeod syndrome: a case report.
abstract: BACKGROUND
  Swyer-James-MacLeod syndrome or unilateral hyperlucent lung syndrome is a rare entity associated with postinfectious bronchiolitis obliterans occurring in childhood. It is characterized by hypoplasia and/or agenesis of the pulmonary arteries resulting in pulmonary parenchyma hypoperfusion.
  
  
  METHODS
  Here we report the case of a 53-year-old Caucasian woman with Swyer-James-MacLeod syndrome found in the differential diagnosis workup for a new onset of heart failure, secondary to pulmonary arterial hypertension complicated by a patent ductus arteriosus.
  
  
  CONCLUSIONS
  Typically, this disorder is diagnosed in childhood after evaluation for recurrent respiratory infections, but sometimes an indolent course means diagnosis is not made until adulthood.
authors.affiliation: Department of Internal Medicine, S, Marcos Hospital, Braga, Portugal. carloscapela@ecsaude.uminho.pt.
authors.forename: Carlos
authors.initials: C
authors.lastname: Capela
authors.forename: Paulo
authors.initials: P
authors.lastname: Gouveia
authors.forename: Marco
authors.initials: M
authors.lastname: Sousa
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Regadas