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. 2021 Aug 27;13(8):788–795. doi: 10.4240/wjgs.v13.i8.788

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©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article selected by an in-house editor and fully peer-reviewed by external reviewers. Following the Creative Commons Attribution-NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works differently terms, provided the original work properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/

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Histology examination. A: Hyaline membranes (marked with an arrow) covering the alveolar walls in a case of septic acute respiratory distress syndrome originating from gangrenous appendicitis in coronavirus disease-2019 patient; B: Microthrombosis resulted in almost complete obstruction of the pulmonary vessel; C: Diffuse alveolar damage with interalveolar hemorrhages and inflammatory cell infiltration, as well as type II hyperplastic pneumocyte (marked with an arrow); D-G: Septicopyemic abscess in the spleen (D, marked with an arrow), kidney (E, marked with an arrow), brain (F, marked with an arrow) and myocardium (G, marked with an arrow); E: Acute tubular necrosis found.