Which imaging findings are characteristic of pulmonary alveolar proteinosis (PAP)?

Updated: Dec 18, 2019
  • Author: Rodolfo Laucirica, MD; Chief Editor: Philip T Cagle, MD  more...
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Answer

Chest radiographs demonstrate bilateral and symmetric areas of airspace consolidation that primarily involve the perihilar regions and lower lobes. [6, 29] These areas of consolidation tend to have a vaguely nodular configuration. With high-resolution computed tomography (HRCT) scanning, the characteristic finding is the presence of ground glass opacities associated with interlobular septal thickening, imparting a “crazy paving” appearance to the lung parenchyma. [30, 31]


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