Difference between revisions of "Vermiform appendix"

Vermiform appendix (view source)

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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>
+=Normal=
+==Normal veriform appendix==
+===General===
+*Seen in right-hemicolectomies for [[colorectal carcinoma|cancer]].
+*May be seen in right hemicolectomies for [[Crohn's disease]].
+===Gross===
+*Shiny serosal surface.
+**No exudate.
+*Small diameter.
+===Microscopic===
+Features:
+*+/-Lymphoid hyperplasia.
+Negatives:
+*No neutrophils in the muscularis propria.
+*No lesion in appendiceal tip.
+*No serosal inflammation.
+*No organisms in the appendiceal lumen, e.g. [[Enterobius vermicularis]].
+==Negative appendectomy==
+===General===
+*Common.
+*Use for quality control among general surgeons.{{fact}}
+===Gross===
+See normal vermiform appendix.
+===Microscopic===
+See normal vermiform appendix.
+Notes:
+*Should be ''[[submitted in total]]''.
 =Inflammatory pathologies=