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  • Stomach, Forestomach - Perforation

    Image of perforation in the forestomach from a male F344/N rat in a chronic study
    Stomach, Forestomach - Perforation in a male F344/N rat from a chronic study. The arrows indicate the edges of the perforation.
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    comment:

    A perforation ( Figure 1image opens in a pop-up window ) is a hole in the stomach. The contents of the stomach have access to the peritoneal cavity and generally incite a marked inflammatory response. Adhesions between the stomach and adjacent organs or the abdominal wall may occur with larger perforations that persist for some time. Perforations are often caused by gavage accident or by large, aggressive ulcers that progress through the submucosa, muscularis, and serosa.

    recommendation:

    Perforation of the forestomach should be diagnosed whenever present, but it is not necessary to assign a severity grade. Secondary lesions, such as inflammation, fibrosis, or adhesions, should generally not be diagnosed separately unless they are prominent components of the lesion. If a perforation is secondary to a foreign body, the foreign body should be diagnosed separately.

    references:

    Bertram TA, Markovits JE, Juliana MM. 1996. Non-proliferative lesions of the alimentary canal in rats GI-1. In Guides for Toxicologic Pathology. STP/ARP/AFIP, Washington, DC, 1-16.
    Full Text: https://www.toxpath.org/docs/SSNDC/GINonproliferativeRat.pdf

    Betton GR. 1998. The digestive system I: The gastrointestinal tract and exocrine pancreas. In: Target Organ Pathology (Turton J, Hooson J, eds). Taylor and Francis, London, 29-60.
    Abstract: http://www.amazon.com/Target-Organ-Pathology-Basic-Text/dp/0748401571

    Brown HR, Hardisty JF. 1990. Oral cavity, esophagus and stomach. In: Pathology of the Fischer Rat (Boorman GA, Montgomery CA, MacKenzie WF, eds). Academic Press, San Diego, CA, 9-30.
    Abstract: http://www.ncbi.nlm.nih.gov/nlmcatalog/9002563

    Leininger JR, Jokinen MP, Dangler CA, Whiteley LO. 1999. Oral cavity, esophagus, and stomach. In: Pathology of the Mouse (Maronpot RR, ed). Cache River Press, St Louis, MO, 29-48.
    Abstract: http://www.cacheriverpress.com/books/pathmouse.htm

    Puurunen J, Huttunen P, Hirvonen H. 1980. Is ethanol-induced damage of the gastric mucosa a hyperosmotic effect? Comparative studies on the effects of ethanol, some other hyperosmotic solutions, and acetyl-salicylic acid on rat gastric mucosa. Acta Pharmacol Toxicol (Copenh) 47:321-327.
    Abstract: http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0773.1980.tb01567.x/abstract