- Anal fistula usually do not harm but can be vary painful with tender swelling
- Irritating due to pus discharge
- Discharge- Bloody or purulent
- Recurrent abscess formation
- Systemic spread of infection
Divided into two groups depending upon their internal opening below or above the ano rectal ring
Low level – Open below the anorectal ring and have 5 varieties
High level – Open at or above anorectal ring and have 3 varieties
|Fig. I23I.-Types of anal fistulae
(standard classification). I. Subcutaneous,
2. submucous, 3. low anal, 4. high anal, 5. pelvi-rectal.
|Fig. I232.-Types of Anal Fistulae, I. Intersphincteric, 2. transphincteric (which may be high or low), 3. supralevator.