Anus and perianal area
Reviewer: Nat Pernick, M.D. (see Reviewers page)
Revised: 14 April 2013, last major update April 2005
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.
● Single linear separation of anal canal tissue extending through mucous membrane
● Often post-traumatic, midline
● 90% at posterior commissure overlying sphincter bifurcation as it divides to circle the rectum
● No specific histologic findings
End of Anus and perianal area > Inflammatory diseases > Fissure
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