Anatomy study note · Lower limb

Inguinal lymph nodes

Superficial and deep nodes in the groin that drain the whole lower limb and the skin of the trunk below the umbilicus, the perineum, external genitalia and lower anal canal.

Key points

• Superficial: horizontal (trunk, perineum, genitalia) + vertical (limb).
• Deep: medial to the femoral vein; one in the femoral canal.
• → external iliac nodes.
• Testes do NOT drain here (para-aortic).
• 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. 11, PDF pp. 1299–1300
• 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 lower limb

• Interossei of the foot
• Joints of the forefoot and toes
• Knee joint
• Menisci of the knee
• Metatarsal bones
• Patella
• Pectineus
• Phalanges of the foot
• Plantar aponeurosis
• Plantar arteries
• Plantar nerves
• Plantaris

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