external iliac lymph nodes external iliac lymph nodes the external iliac lymph nodes are lymph nodes, from eight to ten in number, that lie along the external iliac vessels. external iliac lymph nodescommon iliac lymph nodesmedial common iliacintermediate common iliaclateral common iliacsubaortic common iliaccommon iliac nodes of promontoryexternal iliac lymph nodesmedial external iliacintermediate external iliaclateral external iliacmedial lacunar (femoral)intermediate lacunar (femoral)lateral lacunar (femoral)interiliac external iliacobturator (external iliac obturatory)detailssystemlymphatic systemsourceinguinal lymph nodedrains tocommon iliac lymph nodesidentifierslatinnodi lymphoidei iliaci externifma16646anatomical terminology they are arranged in three groups, one on the lateral, another on the medial, and a third on the anterior aspect of the vessels; the third group is, however, sometimes absent. their principal afferents are derived from the inguinal lymph nodes, the deep lymphatics of the abdominal wall below the umbilicus and of the adductor region of the thigh, and the lymphatics from the glans penis, glans clitoridis, the membranous urethra, the prostate, the fundus of the urinary bladder, the cervix uteri, and upper part of the vagina. additional images regional lymph tissue the parietal lymph glands of the pelvis. iliopelvic glands (lateral view). lymphatics of the prostate. deep lymph nodes and vessels of the thorax and abdomen.