Parks classification of fistula-in-ano
Surgery and anaesthesia
Also known as: Parks-Klassifikation (Analfistel) · Parks sınıflaması (anal fistül) · Parks classification of anal fistulas
What it is for
The Parks classification describes the course of an anal fistula tract relative to the internal and external anal sphincters. Types:
Classification
| Category | Description |
|---|---|
| Intersphincteric | the tract runs in the intersphincteric space between internal and external sphincter, without crossing the external sphincter. |
| Transsphincteric | the tract crosses the external sphincter into the ischioanal (ischiorectal) fossa. |
| Suprasphincteric | the tract rises in the intersphincteric space above the puborectalis, then passes down through the levator ani into the ischioanal fossa to the skin. |
| Extrasphincteric | the tract runs outside the sphincter complex, from the perineal skin through the ischioanal fossa and levator ani into the rectum, without involving the anal canal. |
Source
A classification of fistula-in-ano
Br J Surg 1976;63:1–12 (Parks AG, Gordon PH, Hardcastle JD)
PMID: 1267867
- Edition
- Parks, Gordon and Hardcastle 1976
- Checked on
Summary of the published classification in our own words. Not a substitute for the original publication.
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