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. 2020 Aug 26;74(8):522–527. doi: 10.1136/jclinpath-2020-206623

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Histological changes of organising phase of COVID-19 pneumonia seen in patient 2. (A) Fibrinous exudates in alveoli with admixed inflammatory cells and cell fragments (H&E 20×). (B) Hyperplastic pneumocytes (H&E 40×). (C) Exfoliated pneumocytes in alveolar spaces, some with suspected viral inclusions (arrow) (H&E 40×). (D) Organising diffuse alveolar damage with concentrated inflammatory exudate filling the airspaces (H&E 10×). (E) Residual hyaline membrane in the organising background (H&E 20×). (F) Squamous metaplasia of alveolar spaces (H&E 40×). (G) Interstitial oedema and early fibrosis (Masson trichrome stain 20×). (H) A few inflammatory cells around the bronchioles (H&E 40×). (I) A few lymphocytes seen in the stroma of bronchial submucosal glands (H&E 20×).