Thorax Lymphatic Drainage Flashcards

Study thoracic lymphatic drainage, including lymph node groups, drainage pathways, lymphatic trunks, the thoracic duct, and clinical anatomy.

Card 1 of 30Question

What are the major lymph node groups involved in thoracic lymphatic drainage?

Pulmonary, bronchopulmonary, tracheobronchial, paratracheal, mediastinal, parasternal, and intercostal lymph nodes.

In This Section

1. What are the major lymph node groups involved in thoracic lymphatic drainage?

Pulmonary, bronchopulmonary, tracheobronchial, paratracheal, mediastinal, parasternal, and intercostal lymph nodes.

2. Which major lymphatic vessel drains most of the thorax?

The thoracic duct, which drains much of the left thorax and portions of the lower right thorax.

3. Which lymphatic duct commonly receives drainage from the right upper thorax?

The right lymphatic duct, when present as a distinct vessel, or its constituent trunks draining separately.

4. Where does the thoracic duct typically originate?

At the cisterna chyli in the upper abdomen, usually near vertebral levels L1 to L2.

5. Through which opening does the thoracic duct enter the thorax?

The aortic hiatus of the diaphragm at approximately T12.

6. Where does the thoracic duct lie in the lower posterior mediastinum?

Between the descending thoracic aorta and azygos vein, posterior to the esophagus.

7. At approximately which vertebral level does the thoracic duct cross toward the left side?

Around T4 to T6, although the precise level varies.

8. Where does the thoracic duct usually terminate?

At the left venous angle, between the left internal jugular and subclavian veins.

9. Where does the right lymphatic duct typically terminate?

At the right venous angle, near the junction of the right internal jugular and subclavian veins.

10. Which lymphatic trunks collect much of the lymph from thoracic mediastinal nodes?

The right and left bronchomediastinal trunks.

11. Where are the pulmonary lymph nodes located?

Within the lungs, along intrapulmonary bronchi and associated pulmonary vessels.

12. Where are the bronchopulmonary lymph nodes located?

At the hila of the lungs, near the main bronchi and pulmonary vessels.

13. What are the two principal lymphatic plexuses of the lungs?

The superficial subpleural plexus and the deep peribronchovascular plexus.

14. What is the usual sequence of lymphatic drainage from the lung parenchyma?

Pulmonary nodes, bronchopulmonary nodes, tracheobronchial nodes, and paratracheal nodes.

15. Where are the superior tracheobronchial lymph nodes located?

Near the junction of the trachea and main bronchi, above the pulmonary hila.

16. Where are the inferior tracheobronchial lymph nodes located?

Below the tracheal bifurcation, around the carina.

17. What is the anatomical significance of lymphatic drainage from the left lower lung?

Some lymph may cross to right-sided tracheobronchial or paratracheal nodes.

18. Where are the paratracheal lymph nodes located?

Along both sides of the trachea in the superior mediastinum and lower neck.

19. Which lymph node groups drain the anterior thoracic wall?

Primarily the parasternal and axillary lymph nodes.

20. Where are the parasternal lymph nodes located?

Along the internal thoracic vessels near the lateral borders of the sternum.

21. Which structures drain lymph to the parasternal lymph nodes?

The medial breast, anterior thoracic wall, and portions of the diaphragm.

22. Which lymph nodes primarily receive lymph from the posterior thoracic wall?

The intercostal lymph nodes, particularly those near the heads of the ribs.

23. Where does lymph from the lower posterior intercostal spaces commonly drain?

Toward the thoracic duct, often through a descending intercostal lymphatic trunk.

24. Which lymph node groups receive lymph from the diaphragm?

Anterior, middle, and posterior diaphragmatic lymph nodes, with drainage also reaching parasternal and posterior mediastinal nodes.

25. Which lymph nodes receive most lymphatic drainage from the breast?

The axillary lymph nodes, particularly the anterior or pectoral group.

26. Which axillary lymph node group receives lymph from the pectoral nodes before drainage reaches the apical nodes?

The central axillary lymph nodes.

27. Which lymph nodes commonly receive lymphatic drainage from the esophagus in the thorax?

Posterior mediastinal, paratracheal, and tracheobronchial nodes, depending on the esophageal level.

28. Which lymph node groups participate in lymphatic drainage of the heart?

Tracheobronchial and anterior mediastinal nodes, reached through cardiac lymphatic collecting vessels.

29. Why is thoracic lymphatic drainage important in lung cancer staging?

Tumor spread to hilar, mediastinal, or contralateral lymph nodes affects the nodal stage and treatment planning.

30. What is chylothorax?

Accumulation of chyle in the pleural cavity, commonly resulting from injury or obstruction of the thoracic duct or its tributaries.