[Failure in sclerotherapy: interpretation and management]

In the following summary, we give the definition and interpretation of sclerotherapeutic failure, and the procedure to be observed in such cases. Failure will appear either as postsclerotic relapse, phlebitis at the site of injection, or absence of sclerosis after adequate dosing of sclerosants. In such cases, there are three possibilities: 1. the patient is less sensitive to the sclerosant; 2. the patient has developed sclero-resistance; 3. the patient has an initially concealed saphenous insufficiency. We give you the procedure to follow in each of the three cases.