Image of true duplicate Great Saphenous Vein.  The Hallmark of a duplicate system is that both vessels are interfascial.  If a vessel is identified subfascial (beneath the deep fascia) and associated with the Great Saphenous vein, it is a perforator.  If a vessel is epifascial (above the saphenous fascia) and associated with the Great Saphenous Vein, it is an accessory branch/tributary.
	This is a great example of a dilated and incompetent anterolateral accessory branch originating at the SFJ and coursing to the anterior thigh and lateral calf.
	This is an image of an incompetent posterior tibial (Cockett) perforating vein.  Note the retrograde flow from the tibial vein into the posterior arch vein with augmentation. Perforators > 3mm in diameter are associated with reflux in >90% of the cases.
	This transverse saphenous vein is immediate post R/F thermoablation and has the typical wall thickening resembling a "cheerio".  This is a good indication of intimal denuding and effective treatment.
	This image is 1 month post (RFA) RadioFrequency Ablation of the greater saphenous vein (GSV) due to severe incompetence.  The image is at the saphenofemoral junction.  Note the patent common femoral and femoral vein with inflow from the superior epigastric vein. The GSV is closed as expected.