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Nose - Foreign Material - Gallery

Image of foreign material in the nose from a female F344/Ntac rat in an acute study
Nose - Foreign material in a female F344/NTac rat from an acute study. Free dark brown particulate material is present in the nasal cavity (arrows).
Image of foreign material in the nose from a female F344/Ntac rat in an acute study
Nose - Foreign material in a female F344/NTac rat from an acute study (higher magnification of Figure 1). The dark brown particulate material (arrows) is associated with proteinaceous material.
Image of foreign material in the nose from a female F344/Ntac rat in an acute study
Nose, Nasopharyngeal duct - Foreign material in a female F344/NTac rat from an acute study. Dark brown particulate material is present at the base of the nasopharyngeal duct (arrow).
Image of foreign material in the nose from a female F344/Ntac rat in an acute study
Nose, Nasopharyngeal duct - Foreign material in a female F344/NTac rat from an acute study (higher magnification of Figure 3). The dark brown particulate material is within macrophages.
Image of foreign material in the nose from a female F344/Ntac rat in a subchronic study
Lung - Foreign material in a female F344/NTac rat from a subchronic study. The appearance of the dark brown particulate material in the lungs from a longer-duration study of the same material is similar to that shown in Figures 1-4.