What is a "small saphenous vein"?

A small saphenous vein, also known as the short saphenous vein, is a superficial vein that runs along the posterior aspect of the leg. It begins at the lateral side of the foot and ascends along the back of the calf, ultimately draining into the popliteal vein. It aids in the return of deoxygenated blood from the lower leg and foot back to the heart.