Difference between revisions of "Vermiform appendix"
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*Shiny serosal surface. | *Shiny serosal surface. | ||
**No exudate. | **No exudate. | ||
* | *Normal diameter. | ||
**6.6 +/- 1.5 mm -- based on CT.<ref name=pmid21344807>{{Cite journal | last1 = Charoensak | first1 = A. | last2 = Pongpornsup | first2 = S. | last3 = Suthikeeree | first3 = W. | title = Wall thickness and outer diameter of the normal appendix in adults using 64 slices multidetector CT. | journal = J Med Assoc Thai | volume = 93 | issue = 12 | pages = 1437-42 | month = Dec | year = 2010 | doi = | PMID = 21344807 }}</ref> | |||
===Microscopic=== | ===Microscopic=== | ||
Features: | Features: | ||
*+/-Lymphoid hyperplasia. | *+/-Lymphoid hyperplasia - mucosa or submucosa. | ||
*Normal colorectal-type mucosa. | |||
*Fatty submucosa. | |||
*Benign smooth muscle. | |||
*Serosa. | |||
Negatives: | Negatives: | ||
*No | *No [[neutrophil]]s in the muscularis propria. | ||
*No lesion in appendiceal tip. | *No lesion in appendiceal tip. | ||
*No serosal inflammation. | *No serosal inflammation ([[periappendicitis]]). | ||
*No organisms in the appendiceal lumen, e.g. [[Enterobius vermicularis]]. | *No organisms in the appendiceal lumen, e.g. [[Enterobius vermicularis]]. | ||
DDx: | |||
*[[Adenovirus appendicitis]]. | |||
*[[Cryptosporidiosis]]. | |||
*Mild colitis. | |||
==Negative appendectomy== | ==Negative appendectomy== | ||