Difference between revisions of "MRI of perianal fistula"

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== Epidemiology ==
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*Uncommon condition
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*High morbitidy
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*Men (2:1)
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*Young adults
  
 
== Technique ==
 
== Technique ==
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*Enhancement sequence: T1 FS
 
*Enhancement sequence: T1 FS
  
== Types ==
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== Anatomy ==
* Intersphincteric
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* Transsphincteric
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== Classification ==
* Suprasphincteric
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* Extrasphincteric
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St. Jame's classification
 +
* Type 1: simple linear intersphincteric fistula
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* Type 2: intersphincteric fistula with abscess or secondary tract
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* Type 3: trans-sphincteric fistula
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* Type 4: trans-sphincteric fistula with formation of abscess or secondary tract within the ischioanal fossa
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* Type 5: suprasphincteric or extrasphincteric fistula
  
 
== Complexity==  
 
== Complexity==  

Latest revision as of 02:40, 13 July 2019

Author: Rodrigo Horstmann Castilhos [notes 1]

Epidemiology

  • Uncommon condition
  • High morbitidy
  • Men (2:1)
  • Young adults

Technique

  • Edema sequences: STIR, T2 FS
  • Enhancement sequence: T1 FS

Anatomy

Classification

St. Jame's classification

  • Type 1: simple linear intersphincteric fistula
  • Type 2: intersphincteric fistula with abscess or secondary tract
  • Type 3: trans-sphincteric fistula
  • Type 4: trans-sphincteric fistula with formation of abscess or secondary tract within the ischioanal fossa
  • Type 5: suprasphincteric or extrasphincteric fistula

Complexity

  • Simple
  • Complex

Characteristics

  • Internal opening: location (clock), high vs low.
  • External opening: location (clock), location (perineum, natal cleft), distance to anal margin
  • Involvement of other structures

Notes

  1. 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 Radlines:Authorship for details.

References