Anatomy study note · Abdomen

Abdominal lymph nodes

The abdominal nodes lie mainly along the aorta: a pre-aortic group around the gut arteries and right and left lateral aortic (para-aortic, lumbar) chains.

Key points

• Pre-aortic (coeliac, SMA, IMA nodes) = gut; → intestinal trunk.
• Lateral aortic = kidneys, suprarenals, gonads, uterine fundus; → lumbar trunks.
• Cisterna chyli at L1–2 → thoracic duct.
• Lymph sacs → lymph nodes (except cisterna chyli).
• Node: cortex (B-cell nodules) / paracortex (T cells, HEVs) / medulla.
• Afferent in at the convex side, efferent out at the hilum.

The full note in the atlas also covers

Features · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 7, PDF pp. 965–967
• Inderbir Singh’s Human Embryology, ch. 15, PDF pp. 275–276
• BRS Cell Biology & Histology, 7th ed., ch. 12, PDF pp. 223–224

More from the abdomen

• Appendix
• Ascending colon
• Biliary tree
• Caecum
• Coeliac trunk
• Descending colon
• Duodenum
• Epididymis
• External oblique
• Gallbladder
• Iliac arteries
• Iliacus

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