The spread of foam sclerotherapy has resulted in the renaissance of sclerotherapy as a non-invasive treatment method for varicosis. An expanded European expert committee meeting in Tegernsee in April 2006 was prompted by new findings and continuous further development of the method and worked especially on the topics "The role of (duplex) ultrasound in Foam sclerotherapy" and "Evaluation of therapeutic effects of foam Sclerotherapy". It was felt that these criteria are"non-specific" to foam sclerotherapy and would possibly also be suitable for other endovenous ablative procedures. The organisers of the 2nd European Consensus Meeting on foam sclerotherapy (2nd ECMFS) were then asked to publish these recommendations in this separate publication. The entire recommendations of the 2nd ECMFS are published in an extensive overview in this journal (VASA 2008; 37; Supplement 71: 1-32).