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Difference between revisions of "Anus"
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=Normal= | =Normal= | ||
{{Main|Squamous metaplasia of the | *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= | ||
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<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: | ||