title: "Bong lung" in cystic fibrosis: a case report.
abstract: BACKGROUND
  Marijuana or "bong" lung has been recently described. Subjects typically develop large peripheral paraseptal lung bullae and are predisposed to spontaneous pneumothoraces. The underlying mechanism for bullae formation is uncertain, but probably relates to direct lung toxicity and repeated barotrauma as the smoker performs frequent valsalva manoeuvres in an attempt to derive a greater drug effect.
  
  
  METHODS
  We describe a case of probable "bong lung" occurring in a 23-year-old Caucasian man with cystic fibrosis who had a history of recurrent pneumothoraces and unusual findings on sputum cytology.
  
  
  CONCLUSIONS
  Our case highlights the importance of questioning young adult cystic fibrosis patients about illicit drug use and the utility of sputum cytology and computed tomography scanning when patients present with pneumothoraces and deteriorations in clinical status.
authors.affiliation: Departments of Respiratory Medicine, Royal Hobart Hospital, Liverpool Street, Hobart, Tasmania, 7000, Australia. D.E.C.Reid@utas.edu.au.
authors.forename: Zoe
authors.initials: Z
authors.lastname: Gao
authors.forename: Richard
authors.initials: R
authors.lastname: Wood-Baker
authors.forename: Robin
authors.initials: R
authors.lastname: Harle
authors.forename: Kon
authors.initials: K
authors.lastname: Muller
authors.forename: Jenny
authors.initials: J
authors.lastname: Hauser
authors.forename: David W
authors.initials: DW
authors.lastname: Reid