Written and medically reviewed by: Assoc. Prof. Cengiz Dibekoğlu, MD, General SurgeryLast updated:
Anal Fistula — Laser Fistula Treatment (FiLaC)
Sphincter-sparing laser ablation
FiLaC passes a thin laser fiber through the fistula tract to ablate the lining from inside, aiming to close the channel without cutting the sphincter. It suits selected anatomy in experienced centers. Short-term results are reasonable in many series; long-term healing data are more limited than for classic techniques.
Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Figure summary
This educational figure shows: FiLaC.
Who may be a candidate?
- Selected transsphincteric tracts
- Continence preservation priority
- No active large abscess cavity
- Often after seton preparation
Key points
- Key note inside
Expectation management
Not a one-needle cure. Success varies; recurrence may need LIFT, flap, or another sphincter-sparing option.
Possible advantages
No sphincter division, smaller wound, faster return to routine in many patients.
Limitations
Active sepsis, horseshoe branches, or very wide tracts may need drainage/seton first.
FiLaC vs VAAFT
VAAFT uses video to debride the tract; FiLaC uses laser energy to obliterate the channel—they are different tools.
More chapters in this hub
Diagnosis & anatomy
Anal Fistula Symptoms
Discharge, recurrent abscess, and urgent warning signs
What Causes an Anal Fistula?
Abscess, Crohn’s, and other triggers
Abscess and Fistula Link
Infection first, tunnel second
Anal Fistula Classification
Simple versus complex — explained for shared decisions
Anal Fistula Diagnosis
Exam, MRI mapping, and Parks classification
Simple fistula
Complex fistula
Seton
LIFT / flap
Crohn
Newer sphincter-preserving techniques
Recovery / recurrence / continence
Appointment / info
This page is for education. It is not medical advice and does not replace a visit with your physician.
Medical editor: Assoc. Prof. Cengiz Dibekoğlu, MD · Last medically reviewed: August 2026 · English patient-education chapter.