| Fistula Type |
Description |
| Intersphincteric |
Confined to intersphincteric plan, does not cross external sphincter or levator muscles |
| Transsphincteric |
Tracks passes radially through external sphincter |
| Suprasphincteric |
Track passes upward within intersphincteric plane over puborectalis muscles and descends through levator muscles, ischiorectal fossa |
| Extrasphincteric |
Fistula’s course is completely outside external sphincter |
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