great saphenous vein refluxa, Pretreatment duplex image showing midthigh great saphenous vein reflux. Note diameter markers. b, Same vein level at 6 mo, showing diameter reduction, vein wall thickening, and a narrow, irregular, echolucent lumen without flow. c, Same level at 2 years, now seen as a featureless hyperechogenic stripe with further diameter shrinkage and no discernible lumen.
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