Difference between revisions of "MRI of perianal fistula"
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*Edema sequences: STIR, T2 FS | *Edema sequences: STIR, T2 FS | ||
*Enhancement sequence: T1 FS | *Enhancement sequence: T1 FS | ||
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== Classification == | == Classification == | ||
Revision as of 18:03, 18 July 2019
Author:
Rodrigo Horstmann Castilhos [notes 1]
Contents
Epidemiology
- Uncommon condition
- High morbitidy
- Men (2:1)
- Young adults
Technique
- Edema sequences: STIR, T2 FS
- Enhancement sequence: T1 FS
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
- ↑ 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.
