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    Image of inflammation in the ear from a male F344/N rat in a chronic study
    Ear - Inflammation, Acute in a male Fischer 344/N rat from a chronic study. There is predominantly neutrophilic infiltrates in the epithelium and lamina propria and abundant neutrophils and proteinaceous fluid in the external ear canal (arrow).
    Image of inflammation in the ear from a male F344/N rat in a chronic study
    Ear - Inflammation, Chronic active in a male Fischer 344/N rat from a chronic study. There are neutrophils and mononuclear cells in the lamina propria (arrow) extending into the hyperplastic epithelium (arrowhead) lining the tympanic cavity.
    Image of inflammation in the ear from a male F344/N rat in a chronic study
    Ear - Inflammation, Suppurative in a male F344/N rat from a chronic study. There is intraluminal necrotic debris and neutrophils (arrow); epithelial necrosis with denudation and neutrophil infiltration of the laminal propria is also present.
    Image of inflammation in the ear from a female F344/N rat in a chronic study
    Ear - Inflammation, Chronic in a female Fischer/344N rat from a chronic study. There are macrophages and mononuclear cells in
    Image of inflammation in the ear from a female F344/N rat in a chronic study
    Ear - inflammation, chronic in a female Fischer/344N rat from a chronic study (higher magnification of Figure 4). The inflammatory cells and fibrosis in the wall of the external ear canal are shown in greater detail.