Common iliac artery
The common iliac arteries are two large arteries that originate from the aortic bifurcation at the level of the fourth lumbar vertebra. They end in front of the sacroiliac joint, one on either side, and each bifurcates into the external and internal iliac arteries.
|Common iliac artery|
Front of abdomen, showing surface markings for arteries and inguinal canal.
Volume rendered CT scan of abdominal and pelvic blood vessels.
|Vein||common iliac veins|
|Latin||arteria iliaca communis|
They are about 4 cm long in adults and more than a centimeter in diameter. The arteries run inferolaterally, along the medial border of the psoas muscles to their bifurcation at the pelvic brim, in front of the sacroiliac joints.
The common iliac artery, and all of its branches, exist as paired structures (that is to say, there is one on the left side and one on the right).
The distribution of the common iliac artery is basically the pelvis and lower limb (as the femoral artery) on the corresponding side.
Both common iliac arteries are accompanied along their course by the two common iliac veins which lie posteriorly and to the right. Their terminal bifurcation is crossed anteriorly by the ureters. This is significant as the bifurcation of the common iliac artery is the second point of ureteric constriction.
Dilatation of the common iliac artery can be graded into the following categories:
|Normal||Diameter ≤12 mm|
|Ectasia||Diameter 12 to 18 mm|
|Aneurysm||Diameter ≥18 mm|
- Bifurcation of the aorta and the right common iliac artery - side view. Hypogastric artery is an old term for internal iliac artery. (Com. iliac. a. is visible at center bottom left.)
- Deep and superficial dissection of the lumbar plexus.
- Posterior abdominal wall, after removal of the peritoneum, showing kidneys, suprarenal capsules, and great vessels.
- Common iliac arteries
- Melissa L Kirkwood. "Iliac artery aneurysm". Retrieved February 23, 2018. Last updated: Mar 27, 2017.
- Gray's s157 - "The arteries of the lower extremity"
- Gray's s173 - "The veins of the lower extremity, abdomen, and pelvis"
- Hypogastric artery - thefreedictionary.com
- Atlas image: abdo_wall75 at the University of Michigan Health System - "The Abdominal Aorta"
- Anatomy photo:40:09-0102 at the SUNY Downstate Medical Center - "Posterior Abdominal Wall: The Abdominal Aorta and Paraaortic Nerve Plexus"
- Anatomy image:8969 at the SUNY Downstate Medical Center