Difference between revisions of "Colon"
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==Microscopic evaluation== | ==Microscopic evaluation== | ||
| + | ===Screening=== | ||
In a general screening, look for: | In a general screening, look for: | ||
<gallery mode=packed> | <gallery mode=packed> | ||
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*[[Colitis]], such as by neutrophilic infiltration | *[[Colitis]], such as by neutrophilic infiltration | ||
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| + | ===Common incidental findings=== | ||
| + | <gallery mode=packed> | ||
| + | File:Melanosis coli (4130655629).jpg|'''Melanosis coli''', lipofuscin-containing macrophages | ||
| + | </ref> | ||
===Microscopy report=== | ===Microscopy report=== | ||
Revision as of 19:12, 6 October 2020
Author:
Mikael Häggström [note 1]
This article also includes the rectum.
Contents
Presentations
Gross processing
More specific grossing is available for presentations above. For larger specimens (not biopsies):
- Identify segment of colon
- Measure length and variations in width
- 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
- Semi-quantitate the number of diverticula – “numerous” 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
- Optionally, measure the mesentery
- Note any obvious mesenterial lymph nodes
- Sections to submit for microscopy:
- 2 sections of any perforation(s), one section of intact diverticulum, any mucosal lesions, any obvious lymph nodes.
- If there is no perforation: 3 sections of diverticulum.
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
<gallery mode=packed> File:Melanosis coli (4130655629).jpg|Melanosis coli, lipofuscin-containing macrophages </ref>
Microscopy report
Example report in an unremarkable biopsy:
| Colonic mucosa, negative for significant histopathologic changes. |
Notes
- ↑ 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
