[Computerized tomography image of pulmonary alveolar proteinosis]

Pulmonary alveolar proteinosis is a rare disease of uncertain etiology. It progresses with alveolar deposits of PAS-positive material, exhibits in the long-term interstitial changes of the lung skeleton, and can be complicated by superinfections. The computed tomographic image is characterized by geographically sharply delineated alveolar infiltrates, faint, ground-glass-like parenchymal turbidity, with well bordered interstitial structures and recesses in the subpleural space.