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The correspondence between HRCT and pCLE imaging. The last scan (A) of the RS8, where the Alveoflex probe (arrow) is still seen and the next 1.0 mm step without the probe (arrow) (B), demonstrates the HRCT signs typical for PAP. pCLE (C) shows a large amount of fluorescent floating intra-alveolar complexes. HRCT indicates high-resolution computed tomography; PAP, pulmonary alveolar proteinosis; pCLE, probe-based confocal laser endoscopy.
