deep circumflex iliac vein deep circumflex iliac vein the deep circumflex iliac vein is formed by the union of the venae comitantes of the deep iliac circumflex artery, and joins the external iliac vein about 2 cm. above the inguinal ligament. it also receives small tributary branches from the thoracoepigastric vein deep circumflex iliac veinthe veins of the right half of the male pelvis.the iliac veins.detailsdrains toexternal iliac veinarterydeep circumflex iliac arteryidentifierslatinvena circumflexa ilium profundata98a12.3.10.027ta25054fma21182anatomical terminology