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Difference between revisions of "Vermiform appendix"
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*Granulomatous appendicitis. | *Granulomatous appendicitis. | ||
*Crohn's disease of the appendix. | *Crohn's disease of the appendix. | ||
==Granulomatous appendicitis== | |||
Most common cause: | |||
*Yersinia appendicitis.<ref name=pmid11257626>{{cite journal |author=Lamps LW, Madhusudhan KT, Greenson JK, ''et al.'' |title=The role of Yersinia enterocolitica and Yersinia pseudotuberculosis in granulomatous appendicitis: a histologic and molecular study |journal=Am. J. Surg. Pathol. |volume=25 |issue=4 |pages=508–15 |year=2001 |month=April |pmid=11257626 |doi= |url=}}</ref> | |||
DDx:<ref>[http://granuloma.homestead.com/appendicitis.html http://granuloma.homestead.com/appendicitis.html]</ref> | |||
*Yersinia appendicitis.<ref name=pmid11257626>{{cite journal |author=Lamps LW, Madhusudhan KT, Greenson JK, ''et al.'' |title=The role of Yersinia enterocolitica and Yersinia pseudotuberculosis in granulomatous appendicitis: a histologic and molecular study |journal=Am. J. Surg. Pathol. |volume=25 |issue=4 |pages=508–15 |year=2001 |month=April |pmid=11257626 |doi= |url=}}</ref> | |||
**Yersinia = gram negative rod. | |||
*Other micro-organism (TB, fungus). | |||
*Crohn's disease. | |||
*Sarcoidosis. | |||
*Foreign body reaction. | |||
*Interval (delayed) appendectomy. | |||
===Microscopic=== | |||
Features: | |||
*Granulomas. | |||
==Tumours of the appendix== | ==Tumours of the appendix== | ||
==Adenocarcinoma== | ==Adenocarcinoma== | ||
*Like ''colorectal adenocarcinoma'' - see ''[[ | *Like ''colorectal adenocarcinoma'' - see ''[[colorectal tumours]]''. | ||
==Mucinous tumour== | ==Mucinous tumour== | ||
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*Marked nuclear pleomorphism. | *Marked nuclear pleomorphism. | ||
*Invasion into the wall. | *Invasion into the wall. | ||
==Goblet cell carcinoid== | ==Goblet cell carcinoid== | ||