Great saphenous vein

• Great saphenous vein lies in Superficial fascia. It is the longest vein in the body and represents pre-axial vein of lower limb
• Formed by:

  Union of medial end of dorsal venous arch of the foot and medial margin vein of the foot.
• Great saphenous vein:

  1. Runs upward about 2.5cm in front of medial malleolus

  2. Crosses obliquely the medial surface of the lower third of tibia

  3. Ascends a little behind the medial border of tibia to reach the knee

  4. Lies on the posteromedial aspect of the knee joint, about one hand-breadth posterior to the patella

  5. Runs upward along the medial side of the thigh to reach the saphenous opening (fossa ovalis)
• The great saphenous vein then passes through the saphenous opening after piercing cribriform fascia and drains into femoral vein after piercing femoral sheath