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Cryoprobe biopsy showing different stages of DAD. Representative hematoxylin and eosin stained (HES) cryobiopsies showing different stages of DAD. (a) Diffuse alveolar damage with pneumocyte hyperplasia (HES × 20), (b) exudative diffuse alveolar damage (HES × 20), and (c) diffuse alveolar damage, exudative phase (HES × 60).
