Anatomy study note · Thorax

Lymph nodes of the thoracic wall

Lymph from the thoracic wall goes partly to axillary nodes and partly to nodes inside the thorax along the internal thoracic artery and the backs of the intercostal spaces.

Key points

• Anterior chest skin → anterior axillary; back skin → posterior axillary.
• Intercostal spaces → parasternal (front) + posterior intercostal (back).
• Parasternal nodes also drain the medial breast.
• 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. 4, PDF pp. 513–514
• 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 thorax

• Main and lobar bronchi
• Mediastinal and tracheobronchial lymph nodes
• Mitral valve
• Pulmonary trunk
• Pulmonary valve
• Pulmonary veins
• Ribs
• Right atrium
• Right coronary artery
• Right ventricle
• Serratus posterior muscles
• Sternum

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