PMC4631882_01
Appearance of a venous aneurysm of the medial marginal vein of the foot initially diagnosed as a foot hygroma (patient is in upright position).
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fig1
Turbulent flow inside the sac of aneurysm ("yin-yang" sign) detected by duplex ultrasound during the compression of venous foot pump.
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fig2
There was no detectable spontaneous flow in the lumen of the aneurysm with appearance of a turbulent to and fro flow (the so-called "yin-yang" sign) during the compression of the venous foot pump (Figure 2).
Intraoperative aspect of the venous aneurysm before excision.
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fig3
Via 5.0 cm longitudinal skin incision, the sac of aneurysm was visualized and has been dissected from the surrounding tissues (Figure 3).