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Yersinia granulomatous appendicitis

Reviewer: Jaleh Mansouri, M.D. (see Reviewers page)
Revised: 19 October 2012, last major update August 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.


● 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)

Micro description

● Epithelioid granulomas with lymphoid cuffing, transmural inflammation with lymphoid aggregates, mucosal ulceration, cryptitis, usually no bacteria identified

Micro images

Granulomatous appendicitis due to Yersinia

End of Appendix > Appendicitis > Yersinia granulomatous appendicitis

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