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Great Saphenous Vein. This vein is a conjunction of the dorsal vein of the great toe and the dorsal venous arch of the foot. It travels up the leg, in front of the inner ankle protruberance (anterior to the medial malleolus), and ascends all the way up the lower limb on the inner aspect leg and thigh (anteromedial aspect).
A common cause of varicose veins in the legs is reflux in a thigh vein called the great saphenous vein, which leads to pooling in the visible varicose veins below. Chronic venous disease of the legs is one of the most common conditions in the United States, affecting 50% of people age 50 and older.