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Appendix

Appendicitis

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.

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

Micro images
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Granulomatous appendicitis due to Yersinia

End of Appendix > Appendicitis > Yersinia granulomatous appendicitis


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