Lateral marginal vein

Last revised by Ciléin Kearns on 6 Apr 2023

The lateral marginal vein (also known as the vein of Servelle or the Klippel-Trenaunay vein) is located on the dorsal surface of the foot and is the principle tributary forming the small saphenous vein.

The lateral marginal vein is one of two persisting embryonic veins of the leg, the persistent sciatic vein being the other.


As an embryonic vein it usually undergoes regression before birth. It is part of the superficial venous system of the lower limb. Failure of obliteration leads to truncal vascular malformation. A lack of valves leads to presentation with chronic venous insufficiency 2.

Related pathology

It is seen in a portion of patients suffering from Klippel-Trenaunay syndrome.

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