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Comparison between HRCT and pCLE imaging in PAP patients before (A, B) and 2 days after (C, D) the whole-lung lavage. Significant reduction in the amount of floating alveolar complexes is shown at the pCLE images with a slight increase in the transparency of the right lung in the corresponding HRCT zones. HRCT indicates high-resolution computed tomography; PAP, pulmonary alveolar proteinosis; pCLE, probe-based confocal laser endoscopy.
