Organ
Para-aortic (lumbar) lymph nodes
Lumbar lymph nodes around the great abdominal vessels
High-yield
Testicular lymph follows the gonadal vessels to retroperitoneal nodes. Ovarian drainage also reaches this region, with additional pelvic connections.
Overview
The lumbar nodal chains lie around the aorta and inferior vena cava. They receive lymph from retroperitoneal organs, gonads and more inferior iliac chains. Their vessels converge into lumbar trunks, linking these territories with the thoracic duct system.
Reference facts
- Location
- Along the abdominal aorta and inferior vena cava, extending upward from the aortic bifurcation.
- Parts
- Include para-aortic, paracaval, interaortocaval and posterior groups; terminology varies with the anatomical or oncological map.
- Drains from
- Receive renal, adrenal, gonadal and posterior abdominal drainage, iliac efferents, and some uterine and tubal lymphatics.
- Venous/Lymphatic drainage
- Efferent vessels converge into lumbar trunks that join the thoracic duct system, with or without a discrete cisterna chyli.
- Function
- Provide immune surveillance for large retroperitoneal and lower-body drainage territories.
Clinical correlation
Retroperitoneal nodes are assessed with imaging in gonadal cancers. The expected initial nodal territory differs between right and left testes, and normal groin nodes do not exclude retroperitoneal disease.
Frequently asked questions
Where are the para-aortic (lumbar) lymph nodes located?
Along the abdominal aorta and inferior vena cava, extending upward from the aortic bifurcation.
What do the para-aortic (lumbar) lymph nodes do?
Provide immune surveillance for large retroperitoneal and lower-body drainage territories.
What are the parts of the para-aortic (lumbar) lymph nodes?
Include para-aortic, paracaval, interaortocaval and posterior groups; terminology varies with the anatomical or oncological map.
How do the para-aortic (lumbar) lymph nodes drain?
Efferent vessels converge into lumbar trunks that join the thoracic duct system, with or without a discrete cisterna chyli.