Stomach, Forestomach - Cyst
comment:Cysts (including keratin cysts and epithelial inclusion cysts) can occur in the esophagus or forestomach near the limiting ridge and antral mucosa. Cysts in the nonglandular stomach are usually lined by keratinized stratified squamous epithelium and less frequently by mucous cells. Usually cysts are considered incidental findings.
recommendation:Cysts should be diagnosed and described in the pathology narrative. Cysts are not graded in NTP studies unless the pathologist feels the cysts are treatment related and severity grading would reveal a treatment effect.
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
Chan PC, Mahler J, Peddada S, Lomnitski L, Nyska A. 2003. Forestomach tumor induction by 2,4-hexadienal in F344N rats and B6C3F1 mice. Arch Toxicol 77:511-520. Abstract: http://www.ncbi.nlm.nih.gov/pubmed/12879212
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
National Toxicology Program. 1993. NTP TOX-29. Toxicity Studies of Cupric Sulfate (CAS No. 7758-99-8) Administered in Drinking Water and Feed to F344/N Rats and B6C3F1 Mice. NTP, Research Triangle Park, NC. Abstract: http://ntp.niehs.nih.gov/go/13830
Web page last updated on: November 13, 2014