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(a) Bronchoscopy images show a whitish cheese-like material on the right upper bronchus and swollen and hyperemic mucosae; A bronchoscopic biopsy specimen shows (b) extensive necrosis, nonseptate hyphae with irregular, right-angle branching (arrowhead) and branches of different thickness on the hematoxylin- and eosin-stained sections (x400); (c) Extensive necrosis and fungal hyphae are revealed by periodic acid Schiff staining (x400).
