Fig. 2. (A) Lung tissue that does not show ischemic injury (H&E, ×40). (B) Moderate degree of ischemic lung injury characterized by interstitial septal thickening, neutrophil infiltration, mild intra-alveolar edema and bleeding areas (+) (H&E, ×200). (C) Diffuse, severe ischemic lung injury characterized by bleeding, edema, interstitial congestion, and neutrophil infiltration (H&E, ×200).