The anal complex fistula constitutes a challenge in proctologic surgery because of the of its therapeutic care complexity due to the frequency of recurrences and the necessity to protect the sphincter function.

For several years,differents techniques were developed "said sphincter sparing techniques" to handle fistulas at risk on the anal continence.

Recently there is one of them , named FiLAC using a clip system not yet evaluated.

The purpose is to assess the success rate of his new surgery technique.

Inclusion Criteria:

• Patient with anal fistula drained at least 3 months before inclusion.

Exclusion Criteria:

• Fistula not well drained

Patient having a surgical indication using FiLAC laser technique