Intermediate Thorax Lymphatic Drainage Quiz

Q1. Through which diaphragmatic opening does the thoracic duct usually enter the thorax?

• Caval opening
• Obturator canal
• Aortic hiatus
• Esophageal hiatus

Q2. Which structures commonly flank the thoracic duct in the lower posterior mediastinum?

• Azygos vein on the right and descending thoracic aorta on the left
• Internal thoracic arteries on both sides
• Pulmonary arteries on both sides
• Subclavian veins on both sides

Q3. At approximately which vertebral level does the thoracic duct commonly cross from the right side toward the left?

• Around T5
• At the coccyx
• Around S2
• Around L5

Q4. Which sequence best represents a common lymphatic route from lung parenchyma toward central thoracic drainage?

• Popliteal nodes to iliac nodes to mediastinal nodes
• Mesenteric nodes to pulmonary nodes to cervical nodes
• Parasternal nodes to axillary nodes to inguinal nodes
• Pulmonary nodes to bronchopulmonary nodes to tracheobronchial nodes

Q5. Which tracheobronchial nodes lie below the carina between the main bronchi?

• Superficial cervical lymph nodes
• Inferior tracheobronchial nodes
• Preauricular lymph nodes
• Submental lymph nodes

Q6. Which thoracic lymph nodes can receive drainage from the medial part of the breast?

• Submental lymph nodes
• Popliteal lymph nodes
• Mesenteric lymph nodes
• Parasternal lymph nodes

Q7. Why are parasternal lymphatic communications across the midline anatomically important?

• They carry arterial blood between the breasts
• They connect the thorax directly to the popliteal fossa
• They provide potential routes to the opposite side of the thorax
• They prevent all lymph from reaching nodes

Q8. Which lymph nodes receive drainage from structures in the anterior mediastinal region?

• Occipital lymph nodes
• Inferior mesenteric lymph nodes
• Popliteal lymph nodes
• Anterior mediastinal lymph nodes

Q9. How does much of the parietal pleura drain lymphatically?

• It has no lymphatic drainage
• Directly into the portal vein
• Only through pulmonary nodes inside the lung
• Through lymphatic pathways of the adjacent thoracic wall and diaphragm

Q10. Which trunks commonly receive efferent lymph from tracheobronchial and mediastinal nodes?

• Femoral veins
• Bronchomediastinal trunks
• Lumbar trunks only
• Intestinal trunk only