Ano-perineal lesions are the first signs of Crohn's disease in 1/3 to 1/2 of cases. They are most often associated with a poor prognosis of the disease and their management is complex and difficult because of the dilapidated and recurrent nature of lesions with significant repercussions on continence and quality of life.||The treatment of these lesions is most often medical and surgical, consisting of drainage of the suppurative lesions and/or the use of biotherapy +/- combined with an immunosuppressant.