“…Indeed, according to the NICE guideline, the DUS exam is necessary to confirm the diagnosis of primary or recurrent varicose veins, and to determine whether the cause of venous reflux is treatable according to the recommended treatments offered by the NICE guidelines (first endothermal ablation, then ultrasound-guided foam sclerotherapy and, when both are unsuitable, open repair surgery). 2 Therefore, in the UK, the DUS report usually includes the presence and distribution of truncal venous reflux, the diameter and course of incompetent veins, the distance of incompetent veins from the skin, as well as the presence and diameter of incompetent perforator veins. However, the diameter of the latest is mainly reported in those centres where their treatment is considered.…”