Cite this page: Yersinia granulomatous appendicitis. PathologyOutlines.com website. http://pathologyoutlines.com/topic/appendixyersinia.html. Accessed January 23rd, 2018.
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