Paraaortic lymph node

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Periaortic lymph node
Lymph node regions.svg
Lymph nodes (Paraaortic labeled in center in blue.)
Illu lymph chain07.jpg
Left Lumbar Lymph Nodes (Paraaortic Lymph Nodes)
1. Lateral aortic
2. Preaortic
3. Postaortic
4. Intermediate Lumbar

Right Lumbar Lymph Nodes (Paracaval Lymph Nodes)
5. Lateral caval
6. Precaval
7. Postcaval
Gray's p.705
Anatomical terminology

The paraaortic lymph nodes (also known as para-aortic, periaortic, peri-aortic, and lumbar) are a group of lymph nodes that lie in front of the lumbar vertebral bodies near the aorta. These lymph nodes receive drainage from the gastrointestinal tract and the abdominal organs.


The paraaortic lymph node group is divided into three subgroups: preaortic, retroaortic, and right and left lateral aortic.


When a paraaortic lymph node dissection or sampling is done as a part of the treatment of cancer, the lateral aortic lymph node group is the most important group. There are typically 15 to 20 lymph nodes on each side.

When dissected, the dissection usually includes the region from the bifurcation of the aorta to the superior mesenteric artery or the renal veins.

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