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Microscopic images showing the following: (a) depict hyperplastic respiratory epithelium with increased goblet cells, overlaying an inflamed stroma (H&E, 20×), (b) preserved cilia of the respiratory mucosa (H&E, 20×), (c) denude partially denuded mucosa, overlaying an inflamed stroma with eosinophils (H&E, 40×), and (d) an edematous stroma harboring ectatic vessels (H&E, 20×).
