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    Image of acute inflammation in the lung from a male Wistar Han rat in a subchronic study
    Lung - Inflammation, Acute in a male Wistar Han rat from a subchronic study. The majority of the inflammatory cells are neutrophils; there is also a small amount of hemorrhage.
    Image of acute inflammation in the lung from a male Wistar Han rat in a subchronic study
    Lung - Inflammation, Acute in a male Wistar Han rat from a subchronic study (higher magnification of Figure 1). The majority of the inflammatory cells are neutrophils, but there are also mononuclear cells, including alveolar macrophages.
    Image of suppurative inflammation in the lung from a male Wistar Han rat in a chronic study
    Lung - Inflammation, Suppurative in a male Wistar Han rat from a chronic study. Large numbers of degenerate neutrophils fill and replace alveoli.
    Image of suppurative inflammation in the lung from a male Wistar Han rat in a chronic study
    Lung - Inflammation, Suppurative in a male Wistar Han rat from a chronic study (higher magnification of Figure 3). Abundant necrotic debris is admixed with the degenerate neutrophils.
    Image of bronchiolar suppurative inflammation in the lung from a male B6C3F1/N mouse in a chronic study
    Lung, Bronchiole - Inflammation, Suppurative in a male B6C3F1/N mouse from a chronic study. Degenerate neutrophils fill the bronchiole.
    Image of suppurative inflammation in the lung from a female B6C3F1/N mouse in a chronic study
    Lung - Inflammation, Suppurative in a female B6C3F1/N mouse from a chronic study. There are numerous large, foamy, activated alveolar macrophages amid the degenerate neutrophils.
    Image of chronic inflammation in the lung from a female B6C3F1/N mouse in a chronic study
    Lung - Inflammation, Chronic in a female B6C3F1/N mouse from a chronic study. The mononuclear inflammatory cells are largely perivascular, peribronchiolar, and subpleural.
    Image of chronic inflammation in the lung from a female B6C3F1/N mouse in a chronic study
    Lung - Inflammation, Chronic in a female B6C3F1/N mouse from a chronic study (higher magnification of Figure 7). Mott cells are visible amid the lymphocytes and plasma cells in the subpleural region.
    Image of chronic inflammation in the lung from a male F344/N rat in a subchronic study
    Lung - Inflammation, Chronic in a male F344/N rat from a subchronic study. These focal, subpleural lesions are a common background finding.
    Image of chronic inflammation in the lung from a male F344/N rat in a subchronic study
    Lung - Inflammation, Chronic in a male F344/N rat from a subchronic study. This is a slightly more severe example of the common background lesion shown in Figure 9, with thickening of the alveolar septa.
    Image of chronic inflammation in the lung from a female B6C3F1/N mouse in a chronic study
    Lung - Inflammation, Chronic in a female B6C3F1/N mouse from a chronic study. Numerous cholesterol clefts and pigmented macrophages are present in this inflammatory lesion.
    Image of chronic inflammation in the lung from a female B6C3F1/N mouse in a chronic study
    Lung - Inflammation, Chronic in a female B6C3F1/N mouse from a chronic study (higher magnification of Figure 11). The macrophages are large, foamy, and activated.
    Image of chronic-active inflammation in the lung from a male F344/N rat in a subchronic study
    Lung - Inflammation, Chronic active in a male F344/N rat from a subchronic study. There is a mixture of lymphocytes, macrophages, and neutrophils.
    Image of chronic-active inflammation in the lung from a male F344/N rat in a subchronic study
    Lung - Inflammation, Chronic active in a male F344/N rat from a subchronic study (higher magnification of Figure 13). There is a mixture of lymphocytes, macrophages, and neutrophils, with a small amount of alveolar hemorrhage.
    Image of chronic-active inflammation in the lung from a male F344/NTac rat in a subchronic study
    Lung - Inflammation, Chronic active in a male F344/NTac rat from a subchronic study. The perivascular and interstitial inflammation in this control rat is consistent with Pneumocystis carinii infection (formerly rat respiratory virus).
    Image of chronic-active inflammation in the lung from a male F344/NTac rat in a subchronic study
    Lung - Inflammation, Chronic active in a male F344/NTAC rat from a subchronic study (higher magnification of Figure 15). The lesion is consistent with Pneumocystis carinii infection (formerly rat respiratory virus).
    Image of chronic-active inflammation in the lung from a male B6C3F1/N mouse in a subchronic study
    Lung - Inflammation, Chronic active in a male B6C3F1/N mouse from a subchronic study. There is a mixture of inflammatory cell types, including neutrophils, and alveolar proteinosis.
    Image of granulomatous inflammation in the lung from a male Wistar Han rat in a chronic study
    Lung - Inflammation, Granulomatous in a male Wistar Han rat from a chronic study. Clusters of large, foamy macrophages are surrounded by mononuclear cells.
    Image of granulomatous inflammation in the lung from a female F344/NTac rat in a subchronic study
    Lung - Inflammation, Granulomatous in a female F344/NTAC rat from a subchronic study. There are numerous multinucleated giant cells in this lesion.
    Image of granulomatous inflammation in the lung from a female F344/NTac rat in a subchronic study
    Lung - Inflammation, Granulomatous from a female F344/NTac rat in a subchronic study (higher magnification of Figure 19). The multinucleated giant cells are of the Langhans type.