: Anal fistula treatment is associated with increasing risk of anal incontinence until 40% of cases. New and alternative treatments (glue, advancement flap, plug…) decrease this risk, but with fistula efficacy treatment in 40 to 60% of cases. Radiofrequency might destroy fistula tract without lesion of anal sphincter.~Objective : Fistula healing rate and anal continence, 6 and 12 months after radiofrequency procedure.~Methods : Clinical and MRI evaluation before, 6 and 12 months after treatment. Patients : 50 patients with low, high, complex and Crohn disease fistula. An intermediate analysis is expected after the first 20 patients, to verify morbidity.~Evaluations :~Fistula clinical healing 6 and 12 months after procedure~Fistula MRI healing 12 months after procedure~Anal continence before and after procedure~Feasibility og radiofrequency procedure~Morbidity~Success and failure prognostics factors of this procedure~Schedule :~First inclusion march 2017~Last inclusion march 2018~Evaluations until march 2019.
Anal fistula treatment is associated with increasing risk of anal incontinence until 40% of cases. New and alternative treatments (glue, advancement flap, plug…) decrease this risk, but with fistula efficacy treatment in 40 to 60% of cases. Radiofrequency might destroy fistula tract without lesion of anal sphincter.~Objective : Fistula healing rate and anal continence, 6 and 12 months after radiofrequency procedure.~Methods : Clinical and MRI evaluation before, 6 and 12 months after treatment. Patients : 50 patients with low, high, complex and Crohn disease fistula. An intermediate analysis is expected after the first 20 patients, to verify morbidity.~Evaluations :~Fistula clinical healing 6 and 12 months after procedure~Fistula MRI healing 12 months after procedure~Anal continence before and after procedure~Feasibility og radiofrequency procedure~Morbidity~Success and failure prognostics factors of this procedure