Fig. 1
From: Lung histopathologic clusters in severe COVID-19: a link between clinical picture and tissue damage
Histopathologic patterns and findings. Exudative phase DAD, with hyaline membranes and edema (A H&E, 5×; B H&E, 20×). Acute fibrinous organizing pneumonia (AFOP) with fibrinous endoalveolar aggregates encompassing inflammatory cells (C H&E, 10×; D H&E, 40×). Early proliferative phase DAD with hypercellularity, type II pneumocyte hyperplasia and atypia (E H&E, 10×; F H&E, 40). Late proliferative phase DAD with interstitial fibroblast proliferation (G H&E, 5×; H H&E, 20×)