Diffuse alveolar hemorrhage with histopathologic manifestations of pulmonary capillaritis: Three case reports

Figure 2 Hematoxylin and eosin staining. A: Aggregation of hemosiderin-laden macrophage cells (HLMs) within the alveolar compartment (long arrow), alveolar interval are mild fibrous thickening and neutrophil infiltrate (short arrow) (400 ×); B: Acute extravasation of fibrin and red blood cells, HLM deposits in the alveolar cavities (long arrow) and neutrophil infiltrates (short arrow) (400 ×); C: Partial lung tissue fibrosis and HLM deposits were observed in the alveolar cavities (long arrow) and neutrophil infiltrates (short arrow) (400 ×).