Samiksha Jaiswal (Editor)

Paraaortic lymph nodes

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Paraaortic lymph nodes

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

Contents

Divisions

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

  • The preaortic group drains the abdominal part of the gastrointestinal tract above the mid-rectum.
  • The retroaortic group drains from the lateral and preaortic glands.
  • The lateral aortic group drains the iliac lymph nodes, the ovaries, and other pelvic organs. The lateral group nodes are located adjacent to the aorta, anterior to the spine, extending laterally to the edge of the psoas major muscles, and superiorly to the crura of the diaphragm.

    • The right lateral aortic glands, are situated partly in front of the inferior vena cava near the termination of the renal vein, and partly behind it on the origin of the psoas major, and on the right crus of diaphragm.

    The left lateral aortic glands form a chain on the left side of the abdominal aorta in front of the origin of the psoas major and on the left crus of the diaphragm.

    Both sets of glands on the right and left side receive

  • (a) the efferents of the common iliac lymph nodes
  • (b) the lymphatics from the testis in the male, and from the ovary, uterine tube, and uterus in the female
  • (c) the lymphatics from the kidney and suprarenal gland
  • (d) the lymphatics draining the lateral abdominal muscles and accompanying the lumbar veins

    • Most of the efferent vessels of the lateral aortic glands converge to form the right and left lumbar trunks which join the cisterna chyli, but some enter the preaortic and retroaortic lymph nodes, and others pierce the crura of the diaphragm to join the lower end of the thoracic duct.

    Dissection

    The lateral aortic lymph nodes, typically 15 to 20 on each side, are the ones usually chosen for dissection or biopsy in the treatment or diagnosis of cancer.

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

    References

    Paraaortic lymph nodes Wikipedia
    (Text) CC BY-SA