title: Tracheal adenoid cystic carcinoma masquerading asthma: a case report.
abstract: BACKGROUND
  Tracheal tumors are often misdiagnosed as asthma and are treated with inhaled steroids and bronchodilators without resolution.
  
  
  METHODS
  Here, a patient with tracheal adenoid cystic carcinoma who had been previously diagnosed with difficult asthma was reported. The possibility of the presence of localized airway obstruction was raised when the flow-volume curve suggesting fixed airway obstruction, was obtained.
  
  
  CONCLUSIONS
  The presenting case report emphasizes the fact that not all wheezes are asthma. It is critical to bear in mind that if a patient does not respond to appropriate anti-asthma therapy, localized obstructions should be ruled out before establishing the diagnosis of asthma.
authors.affiliation: Gazi University School of Medicine, Department of Pulmonary Medicine, Ankara, Turkey. nkokturk@gazi.edu.tr
authors.forename: Nurdan
authors.initials: N
authors.lastname: Kokturk
authors.forename: Sedat
authors.initials: S
authors.lastname: Demircan
authors.forename: Cuneyt
authors.initials: C
authors.lastname: Kurul
authors.forename: Haluk
authors.initials: H
authors.lastname: Turktas