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. 2022 Aug 30;306(2):e221806. doi: 10.1148/radiol.221806

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© 2023 by the Radiological Society of North America, Inc.

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Histologic image (hematoxylin and eosin stain, 100× magnification) of pulmonary parenchyma shows organizing diffuse alveolar damage. There are residual alveolar spaces with marked increase in the interstitium by cellular fibroblastic proliferations. Some fibroblastic proliferations are also likely within alveoli. Type 2 pneumocyte hyperplasia is present. These findings were observed in an explanted lung approximately 6 months after acute COVID-19.