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The '''anus''' occasionally shows-up on the pathologists desk. It sometimes comes with the rectum and [[colon]], as an abdominoperoneal resection (APR). | The '''anus''' occasionally shows-up on the pathologists desk. It sometimes comes with the rectum and [[colon]], as an abdominoperoneal resection (APR). | ||
=Normal= | |||
*The dentate line (also known as the ''pectinate line'') divides the anal canal into upper two thirds and lower one third. | |||
*Typically, the squamocolumnar junction is just above the dentate line. | |||
Note: | |||
*Squamous epithelium 1 cm proximal to the dentate line is considered abnormal.<ref name=pmid11174313>{{Cite journal | last1 = Bujanda | first1 = L. | last2 = Iriondo | first2 = C. | last3 = Muñoz | first3 = C. | last4 = Etxezarraga | first4 = C. | last5 = Ramírez | first5 = MM. | last6 = Ramos | first6 = F. | last7 = Sánchez | first7 = A. | title = Squamous metaplasia of the rectum and sigmoid colon. | journal = Gastrointest Endosc | volume = 53 | issue = 2 | pages = 255-6 | month = Feb | year = 2001 | doi = | PMID = 11174313 }}</ref> | |||
==Squamous metaplasia of the anus== | |||
{{Main|Squamous metaplasia of the anus}} | |||
=Benign disease= | =Benign disease= | ||
==Anal wart== | ==Anal wart== | ||
*See ''[[condyloma acuminatum]]''. | *See ''[[condyloma acuminatum]]''. | ||
==Pilonidal cyst== | |||
:Also ''pilonidal sinus'' and ''pilonidal disease''. | |||
{{Main|Pilonidal cyst}} | |||
==Perianal abscess== | ==Perianal abscess== | ||
===General=== | ===General=== | ||
*Common - often young men.<ref name=pmid22362468>{{Cite journal | last1 = Ommer | first1 = A. | last2 = Herold | first2 = A. | last3 = Berg | first3 = E. | last4 = Fürst | first4 = A. | last5 = Sailer | first5 = M. | last6 = Schiedeck | first6 = T. | title = German S3 guideline: anal abscess. | journal = Int J Colorectal Dis | volume = 27 | issue = 6 | pages = 831-7 | month = Jun | year = 2012 | doi = 10.1007/s00384-012-1430-x | PMID = 22362468 }}</ref> | *Common [[ditzel]] - often young men.<ref name=pmid22362468>{{Cite journal | last1 = Ommer | first1 = A. | last2 = Herold | first2 = A. | last3 = Berg | first3 = E. | last4 = Fürst | first4 = A. | last5 = Sailer | first5 = M. | last6 = Schiedeck | first6 = T. | title = German S3 guideline: anal abscess. | journal = Int J Colorectal Dis | volume = 27 | issue = 6 | pages = 831-7 | month = Jun | year = 2012 | doi = 10.1007/s00384-012-1430-x | PMID = 22362468 }}</ref> | ||
*May be due to [[Crohn's disease]].<ref name=pmid21088749>{{Cite journal | last1 = Lewis | first1 = RT. | last2 = Maron | first2 = DJ. | title = Efficacy and complications of surgery for Crohn's disease. | journal = Gastroenterol Hepatol (N Y) | volume = 6 | issue = 9 | pages = 587-96 | month = Sep | year = 2010 | doi = | PMID = 21088749 }}</ref> | *May be due to [[Crohn's disease]].<ref name=pmid21088749>{{Cite journal | last1 = Lewis | first1 = RT. | last2 = Maron | first2 = DJ. | title = Efficacy and complications of surgery for Crohn's disease. | journal = Gastroenterol Hepatol (N Y) | volume = 6 | issue = 9 | pages = 587-96 | month = Sep | year = 2010 | doi = | PMID = 21088749 }}</ref> | ||
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===Sign out=== | ===Sign out=== | ||
<pre> | |||
Submitted as "Perineal Fistula Tract", Excision: | |||
- Consistent with fistula tract (acutely and chronically inflamed | |||
squamous mucosa with subepithelial inflamed tract, skeletal muscle | |||
and fibrosed tissue). | |||
- NEGATIVE for dysplasia and NEGATIVE for malignancy. | |||
</pre> | |||
====Block letters==== | |||
<pre> | <pre> | ||
PERIANAL TISSUE ("OPENING OF FISTULA"), EXCISION: | PERIANAL TISSUE ("OPENING OF FISTULA"), EXCISION: | ||
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==Anal intraepithelial neoplasia== | ==Anal intraepithelial neoplasia== | ||
*Abbreviated ''AIN''. | *Abbreviated ''AIN''. | ||
{{Main|Anal intraepithelial lesions}} | |||
Note: | |||
*The terminology changing to match the one now widely used for the [[uterine cervix]]. | |||
The | |||
=Anal cancer= | =Anal cancer= | ||
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*[[AKA]] ''anal squamous carcinoma''. | *[[AKA]] ''anal squamous carcinoma''. | ||
*[[AKA]] ''squamous cell carcinoma of the anus''. | *[[AKA]] ''squamous cell carcinoma of the anus''. | ||
{{Main|Anal squamous cell carcinoma}} | |||
==Anal gland adenocarcinoma== | ==Anal gland adenocarcinoma== |
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