1. Intersphincteric Fistula (45-70% of cases)treat with a lower risk of incontinence. 2. . Transsphincteric Fistula (20-30% of cases)Can be "low" or "high" depending on how much of the external sphincter is involved. Complex tracts may require a draining seton or sphincter-sparing procedures. 3. Suprasphincteric Fistula (5-20% of cases) Always classified as a high fistula and is considered complex. 4. Extrasphincteric Fistula 5% of cases These are rare, often caused by pelvic trauma, Crohn's disease, or foreign bodies, and require highly specialized surgical management