Difference between revisions of "Colon"
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*Note the '''thickness''' of the wall. | *Note the '''thickness''' of the wall. | ||
*If a cecal segment does not show an '''appendix''', look in the history for a past appendectomy. If not, put more effort into finding it before reporting it as not found. | *If a cecal segment does not show an '''appendix''', look in the history for a past appendectomy. If not, put more effort into finding it before reporting it as not found. | ||
− | *Note any obvious | + | [[File:Gross pathology of a mesenteric lymph node.jpg|thumb|190px|A mesenteric lymph node.]] |
+ | *Note any obvious mesenteric '''lymph nodes'''. {{Further|Lymph nodes}} | ||
*'''Sections''' to submit for microscopy: | *'''Sections''' to submit for microscopy: | ||
:*2 sections of any perforation(s), one section of any intact diverticulum, any mucosal lesions, any obvious lymph nodes. | :*2 sections of any perforation(s), one section of any intact diverticulum, any mucosal lesions, any obvious lymph nodes. |
Revision as of 09:41, 13 July 2021
Author:
Mikael Häggström [note 1]
Mostly: |
This article also includes the rectum.
Contents
Presentations
- Colorectal polyp
- Colon ischemia
- Colon for diverticulitis
- Intestine with tumor
- Colitis
- Hemorrhoids
- Stoma and "donuts"
Gross processing
More specific grossing is available for presentations above. For larger specimens (not biopsies):
- Identify segment of colon if possible.
- Measure length, average width and any significant variations thereof.
- Optionally, measure the mesentery.
- Inspect the serosa- look for any perforations, adhesions, fistulas and exudate
- If perforation is present, try to probe it from the serosal surface
- Open longitudinally
- If the specimen is not fixed already, put it in formalin, preferably for a total of 48 hours.[1] Section attached fatty tissue for better fixation.
- Semi-quantitate the number of diverticula – “numerous” or "multiple" if too many to count
- Look for for any mucosal lesions. Note any evidence of inflammation, hemorrhage, abscess, perforation or fistula
- Note the thickness of the wall.
- If a cecal segment does not show an appendix, look in the history for a past appendectomy. If not, put more effort into finding it before reporting it as not found.
- Note any obvious mesenteric lymph nodes. Further information: Lymph nodes
- Sections to submit for microscopy:
- 2 sections of any perforation(s), one section of any intact diverticulum, any mucosal lesions, any obvious lymph nodes.
Microscopic evaluation
Screening
In a general screening, look for:
Hyperplasia and/or atypia (colorectal polyp with tubular adenoma pictured)
- Colitis, such as by neutrophilic infiltration
Common incidental findings
Subepithelial lymphoid aggregate, nonspecific, and generally reported as such.[notes 1]
Microscopy report
Example report in an unremarkable biopsy:
(Colon, biopsy:) Colonic mucosa without significant histopathologic changes. |
Notes
- ↑ It is acceptable to not mention a subepithelial lymphoid aggregate at all.
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Patholines:Authorship for details.
Main page
References
Image sources