Difference between revisions of "Anus"

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=Normal=
=Normal=
{{Main|Squamous metaplasia of the rectum}}
*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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