Lymphatics of the lungs

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The lymphatics of the lung consist of several lymph node groups and lymphatic vessels that drain the superficial and deep regions of both lungs into the tracheobronchial nodes surrounding the bifurcation of the trachea and main bronchi. These in turn empty into the right and left bronchomediastinal trunks via paratracheal lymph nodes and ultimately into venous circulation.

The superficial (or subpleural) lymphatics of the lung drain lymph from the visceral pleura and peripheral lung tissue to the bronchopulmonary lymph nodes at the hilar region of each lung. The deep (or central) lymphatics of the lung drain the bronchi and peribronchial parenchyma of the lung via intrapulmonary lymph nodes after which lymph is also ultimately received by the bronchopulmonary lymph nodes. From here, lymph from both the superficial and deep lymphatics of the lungs is passed to the tracheobronchial nodes.

A good understanding of the lymphatic drainage of the lungs is important clinically, particularly in the staging and treatment of lung cancer.

This video will help you learn about the lymphatic drainage of the lungs in detail.

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Summary