Surgical complications in COVID-19 patients in the setting of moderate to severe disease

Figure 1 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.