Fig. 2
From: Lung histopathologic clusters in severe COVID-19: a link between clinical picture and tissue damage
Histopathologic patterns and findings. Microthrombi and megakaryocytes in diffuse alveolar damage (DAD). Two microthrombi within the same arterial vessel in the setting of vascular congestion (A, arrows, H&E, 2.5×), composed of fibrin, erythrocytes, and inflammatory cells (B, H&E, 20×). Increased intracapillary megakaryocytes were sometimes evident even at low power (C, H&E, 10×) and could be readily identified at high power due to their characteristic hyperchromatic, branching nuclei confined within capillary vessels (D, H&E, 20×)