Common iliac vessels

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Common iliac vessels are composed of:

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In human anatomy, the iliac arteries are three arteries located in the region of the ilium in the pelvis:

Common iliac vein Veins draining blood from the pelvis and lower limbs

In human anatomy, the common iliac veins are formed by the external iliac veins and internal iliac veins. The left and right common iliac veins come together in the abdomen at the level of the fifth lumbar vertebra, forming the inferior vena cava. They drain blood from the pelvis and lower limbs.

External iliac vein Blood vessels connecting the thigh veins to the pelvis

The external iliac veins are large veins that connect the femoral veins to the common iliac veins. Their origin is at the inferior margin of the inguinal ligaments and they terminate when they join the internal iliac veins.

External iliac artery Arteries of the pelvis


The external iliac arteries are two major arteries which bifurcate off the common iliac arteries anterior to the sacroiliac joint of the pelvis.

Common iliac artery Large blood vessels

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.

Internal iliac artery

The internal iliac artery is the main artery of the pelvis.

May–Thurner syndrome

May–Thurner syndrome (MTS), also known as the iliac vein compression syndrome, is a condition in which compression of the common venous outflow tract of the left lower extremity may cause discomfort, swelling, pain or clots in the iliofemoral veins.

Median sacral artery

The median sacral artery is a small artery that arises posterior to the abdominal aorta and superior to its bifurcation.

Wing of ilium

The wing of ilium is the large expanded portion which bounds the greater pelvis laterally. It presents for examination two surfaces—an external and an internal—a crest, and two borders—an anterior and a posterior.

Iliac fascia

The iliac fascia, or Abernethy's fascia, is a fascia in the region of the ilium of the pelvis.

Internal iliac vein Large blood vessel of the pelvis

The internal iliac vein begins near the upper part of the greater sciatic foramen, passes upward behind and slightly medial to the internal iliac artery and, at the brim of the pelvis, joins with the external iliac vein to form the common iliac vein.

Superficial circumflex iliac artery

The superficial iliac circumflex artery, the smallest of the cutaneous branches of the femoral artery, arises close to the superficial epigastric artery, and, piercing the fascia lata, runs lateralward, parallel with the inguinal ligament, as far as the crest of the ilium.

Common iliac lymph nodes

The common iliac lymph nodes, four to six in number, are grouped behind and on the sides of the common iliac artery, one or two being placed below the bifurcation of the aorta, in front of the fifth lumbar vertebra.

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