The groin flap is based medially and lies along the line of the groin, using as its arteri-ovenous axial system the superficial circumflex iliac vessels. The artery arises 2-3 cm below the inguinal ligament, usually from the femoral artery, occasionally from the superficial epigas-tric artery at its origin. It runs laterally, parallel to the inguinal ligament, and at the medial border of sartorius gives a deep branch.
From that point onward it gradually becomes more superficial, passing into the tissue which would be raised as a groin flap. Lateral to the