title: Is there any superiority among diagnostic methods in organizing pneumonia in terms of clinical features of the patients?
abstract: BACKGROUND
  Organizing pneumonia (OP) can be idiopathic or secondary to some clinical situations. If an etiological cause is not present, this phenomenon is called cryptogenic OP. Secondary OP is associated with various diseases that are known to induce the OP.
  
  
  OBJECTIVE
  The aim of this study was to evaluate the clinical features of the cases with OP and compare the patients diagnosed by bronchoscopic transbronchial biopsy with patients diagnosed by surgical lung biopsy.
  
  
  METHODS
  Medical records of 41 patients diagnosed with OP between 2004 and 2014 were reviewed retrospectively.
  
  
  RESULTS
  Totally, 41 patients with OP were identified. In all, 39.02% of the cases were diagnosed by bronchoscopic methods, and 60.97% of the cases were diagnosed by surgical procedures. Although the frequency of ground glass opacities, consolidations, and micronodules was higher in the group diagnosed by bronchoscopy, mass-like lesions were more common in the cases diagnosed by surgery. Bronchoscopy, performed in 30 patients totally, had a diagnostic efficacy of 53.33%. Diagnostic value of bronchoscopy was significantly higher in cryptogenic OPs. Although diffuse radiological pattern was more common in "successful bronchoscopy" group, frequency of focal pattern was higher in "failed bronchoscopy" group. Ground glass opacity in successful bronchoscopy group and mass-like lesions in failed bronchoscopy group reached significant differences.
  
  
  CONCLUSIONS
  There were significant differences between the diagnostic procedures in terms of radiological patterns. This is the first study about the relationship between the diagnostic methods and the characteristics of OP.
authors.affiliation: Department of Thoracic Surgery.
authors.forename: Kuthan
authors.initials: K
authors.lastname: Kavakli
authors.affiliation: Department of Chest Diseases.
authors.forename: Nesrin
authors.initials: N
authors.lastname: Ocal
authors.affiliation: Department of Chest Diseases.
authors.forename: Deniz
authors.initials: D
authors.lastname: Dogan
authors.affiliation: Department of Pathology, Gulhane Military Medical Academy, Ankara, Turke.
authors.forename: Ali Fuat
authors.initials: AF
authors.lastname: Cicek
authors.affiliation: Department of Thoracic Surgery.
authors.forename: Hakan
authors.initials: H
authors.lastname: Isik
authors.affiliation: Department of Thoracic Surgery.
authors.forename: Sedat
authors.initials: S
authors.lastname: Gurkok
keywords: clinical feature; cryptogenic organizing pneumonia; diagnostic procedure; secondary organizing pneumonia