Appendix
Appendicitis
Yersinia granulomatous appendicitis


Topic Completed: 1 August 2012

Minor changes: 20 August 2019

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PubMed Search: Yersinia granulomatous appendicitis

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Cite this page: Mansouri J. Yersinia granulomatous appendicitis. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/appendixyersinia.html. Accessed May 30th, 2020.
Definition / general
  • Detected in 25% (10 of 40) cases of granulomatous appendicitis by PCR, either Y. enterocolitica or Y. pseudotuberculosis (Am J Surg Pathol 2001;25:508)
  • Some patients may develop Crohn’s disease
  • Histology similar to non-Yersinia granulomatous appendicitis (differentiate by PCR)
Microscopic (histologic) description
  • Epithelioid granulomas with lymphoid cuffing, transmural inflammation with lymphoid aggregates, mucosal ulceration, cryptitis, usually no bacteria identified
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