NODES
The internal thoracic lymph nodes are a pair of longitudinally-linked chains of nodes on either side of the sternum. They are sited in the anterior section of the intercostal spaces level with the costal cartilage and deep to the intercostal muscles.
Usually, there are 4-5 nodes in total on each side. Typically, these are positioned in the first to third interspaces and the fifth or six interspace.
The internal thoracic nodes receive efferent lymphatic vessels from:
The internal thoracic nodes drain to anterosuperior mediastinal nodes. From here, the bronchomediastinal lymphatic trunk conveys lymph to the great veins within the neck.
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