Vermiform appendix: Difference between revisions
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→Appendicitis: +periappendicitis |
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The appendix is a vestigial structure that is thought to have arisen from a larger cecum. Larger cecae are often seen in herbivores and thought to facilitate better digestion of plant matter.<ref>{{cite book |author=Dawkins, R. |title=The Greatest Show on Earth: The Evidence for Evolution |publisher=Free Press |location= |year=2009 |pages=115 |edition=1st |isbn=978-1416594789 |oclc= |doi= |accessdate=}}</ref> | The appendix is a vestigial structure that is thought to have arisen from a larger cecum. Larger cecae are often seen in herbivores and thought to facilitate better digestion of plant matter.<ref>{{cite book |author=Dawkins, R. |title=The Greatest Show on Earth: The Evidence for Evolution |publisher=Free Press |location= |year=2009 |pages=115 |edition=1st |isbn=978-1416594789 |oclc= |doi= |accessdate=}}</ref> | ||
= | =Inflammatory pathologies= | ||
==Acute appendicitis== | ==Acute appendicitis== | ||
===General=== | ===General=== | ||
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Features: | Features: | ||
*Granulomas. | *Granulomas. | ||
==Inflammatory bowel disease== | |||
: See ''[[Inflammatory bowel disease]]''. | |||
==Periappendicitis== | |||
===General=== | |||
Definition: inflammation of tissues around the (vermiform) appendix.<ref>URL: [http://www.medilexicon.com/medicaldictionary.php?t=66889 http://www.medilexicon.com/medicaldictionary.php?t=66889]. Accessed on: 1 June 2011.</ref> | |||
*May be seen in association of appendicitis or alone. | |||
**With appendicitis it is suggestive of perforation. | |||
**Without concurrent appendicitis it is suggestive of another abdominal pathology.<ref name=pmid2349982>{{Cite journal | last1 = Fink | first1 = AS. | last2 = Kosakowski | first2 = CA. | last3 = Hiatt | first3 = JR. | last4 = Cochran | first4 = AJ. | title = Periappendicitis is a significant clinical finding. | journal = Am J Surg | volume = 159 | issue = 6 | pages = 564-8 | month = Jun | year = 1990 | doi = | PMID = 2349982 }}</ref> | |||
===Microscopic=== | |||
Features: | |||
*Acute inflammation of the serosa. | |||
**[[Neutrophil]]s in the serosa. | |||
=Tumours of the appendix= | =Tumours of the appendix= | ||