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A. A dilated paratibial perforating vein in the calf is shown here, which penetrates the muscular fascia (dotted lines). B. A dilated PV of the femoral canal is shown here, which connects the great saphenous vein (GSV) and the femoral vein (FV). Venous reflux from the deep to the superficial vein is seen on transverse and longitudinal views of Doppler ultrasonography.
