From: Magnetic resonance imaging in the workup of patients with perianal fistulas
 | N = 53 |
---|---|
Parks classification | |
Intersphincteric | 32 (60%) |
Trans-sphincteric | 13 (24.5%) |
Extrasphincteric | 4 (7.5%) |
Suprasphincteric | 4 (7.5%) |
St. James classification | |
Grade I | 23 (43%) |
Grade II | 10 (19%) |
Grade III | 8 (15%) |
Grade IV | 12 (23%) |