Superficial veins become more prominent when muscles are flexed
Small saphenous vein and its tributaries. (Small saphenous vein labeled vertically at center.)
Superficial veins become more prominent when muscles are flexed
Cross-section through middle of leg
Nerves of the dorsum of the foot

The small saphenous vein (also short saphenous vein or lesser saphenous vein) is a relatively large superficial vein of the posterior leg.

- Small saphenous vein

small saphenous vein

- Superficial vein
Superficial veins become more prominent when muscles are flexed

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Overall

The great saphenous vein and landmarks along its course

Great saphenous vein

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The great saphenous vein and landmarks along its course
Superficial veins draining into the great saphenous and femoral vein.
Superficial veins of lower limb. Superficial dissection. Anterior view.
Great saphenous vein. Deep dissection. Anterior view.
Illustration depicting veins of the leg including great saphenous vein (anterior view).

The great saphenous vein (GSV, alternately "long saphenous vein"; ) is a large, subcutaneous, superficial vein of the leg.

At the ankle, the great saphenous vein receives branches from the sole of the foot through the medial marginal vein; in the lower leg it anastomoses freely with the small saphenous vein, communicates by perforator veins (Cockett perforators) with the anterior and posterior tibial veins and receives many cutaneous veins; near the knee it communicates with the popliteal vein by the Boyd perforator, in the thigh it communicates with the femoral vein by perforator veins (Dodd perforator) and receives numerous tributaries; those from the medial and posterior parts of the thigh frequently unite to form a large accessory saphenous vein which joins the main vein near the sapheno-femoral junction.

Left leg of a male affected by varicose veins

Varicose veins

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Left leg of a male affected by varicose veins
How a varicose vein forms in a leg. Figure A shows a normal vein with a working valve and normal blood flow. Figure B shows a varicose vein with a deformed valve, abnormal blood flow, and thin, stretched walls. The middle image shows where varicose veins might appear in a leg.
Comparison of healthy and varicose veins

Varicose veins, also known as varicoses, are a medical condition in which superficial veins become enlarged and twisted.

Stripping consists of removal of all or part the saphenous vein (great/long or lesser/short) main trunk.