Figure 4. Photomicrography of the lung. A - Exudative phase of the diffuse alveolar damage with alveolar spaces filled by macrophages, cellular debris and fibrin (H&E, 100X). B - Pneumonia. Note the alveolar spaces filled by numerous neutrophils (H&E, 200X). C - Lymphatic vessel in the interlobular septum containing leukostasis. Note pulmonary edema in the adjacent pulmonary parenchyma (H&E, 100X). D - Focal necrotizing bronchiolitis with necrosis of the epithelial lining and intraluminal fibrin and cellular debris (H&E, 200X).
