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. 2020 Dec 4;12(12):e11912. doi: 10.7759/cureus.11912

Figure 1. COVID-19 pulmonary histopathology.

Figure 1

A: thick hyaline membranes (arrow), H&E stain, original magnification 400x; B: hemorrhagic areas (arrows), H&E stain, original magnification 20x; C: type II pneumocyte hyperplasia and syncytial cells (white arrows), and casts of desquamated respiratory epithelium (black arrow) in the alveoli, H&E stain, original magnification 400x; D: viral cytopathic effect with multinucleated cells (white arrow) and giant mononucleated cells (black arrows), H&E stain, original magnification 400x; E: perivascular multinucleated cells (arrow), H&E stain, original magnification 400x; F: endotheliitis - reactive endothelial cells (white arrows) and areas of endothelial desquamation (black arrow), H&E stain, original magnification 400x; G: focal fibroblast proliferation and alveolar space obliteration - organizing pneumonia (arrow), H&E stain, original magnification 100x; H: degenerative and necrotic changes in peripheral arterioles (arrows), H&E stain, original magnification 400.

H&E: hematoxylin and eosin.