title: [Analysis of the imaging findings of pulmonary alveolar proteinosis].
abstract: OBJECTIVE
  To analyze the chest X-ray and CT findings of pulmonary alveolar proteinosis (PAP) in an effort to improve the accuracy of diagnosis.
  
  
  METHODS
  The imaging findings by chest X-ray and CT of 6 proven PAP cases (by imaging examinations, autopsy and bronchoalveolar lavage) were retrospectively analyzed on the basis of literature review.
  
  
  RESULTS
  Chest X-ray and CT presented diffuse small nodules in both lungs in the 6 cases, also showing scattered small or large patches of ground-glass opacity (GGO) along with consolidation in the lungs. CT also showed reticular shadows (creating typical crazy-paving appearance) and signs of bronchial air in the patches of GGO.
  
  
  CONCLUSIONS
  X-ray film can find the pulmonary lesions but is usually unable to establish a definite diagnosis. Chest CT is capable of revealing the extent, delineation and characteristic manifestations of PAP, which helps to derive a definite diagnosis in combination with a thorough review of the patients' clinical history.
authors.affiliation: Department of Radiology, First Affiliated Hospital of Guangzhou Medical College, Guangzhou 510120, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Cai
authors.forename: Qing-Si
authors.initials: QS
authors.lastname: Zeng
authors.forename: Yu-Bao
authors.initials: YB
authors.lastname: Guan
authors.forename: Yu
authors.initials: Y
authors.lastname: Deng
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D011649:Pulmonary Alveolar Proteinosis / Q000000981:diagnostic imaging*; D013902:Radiography, Thoracic; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed