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    Image of ulcer in the oral mucosa from a female F344/N rat in a chronic study
    Oral mucosa - Ulcer in a female F344/N rat from a chronic study. A portion of the hard palate mucosa is absent (arrow), exposing the underlying connective tissue.
    Image of ulcer in the oral mucosa from a female F344/N rat in a chronic study
    Oral mucosa - Ulcer in a female F344/N rat from a chronic study (higher magnification of Figure 1). A portion of the hard palate mucosa is absent, exposing the underlying connective tissue.
    Image of ulcer in the oral mucosa from a female F344/N rat in a chronic study
    Oral mucosa - Ulcer in a female F344/N rat from a chronic study. A portion of the hard palate mucosa is absent (arrow), exposing the inflamed underlying connective tissue.
    Image of ulcer in the oral mucosa from a female F344/N rat in a chronic study
    Oral mucosa - Ulcer in a female F344/N rat from a chronic study (higher magnification of Figure 3). A portion of the hard palate mucosa is absent (arrow), exposing the inflamed underlying connective tissue.