Anatomy of the Superior Mediastinum
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Questions and Answers

Which structure does the esophagus deviate to the left and pass through the esophageal hiatus at the level of T10, anterior to?

  • Diaphragm
  • Aorta (correct)
  • Vertebral bodies
  • Left main bronchus

What is the primary posterior relationship of the esophagus?

  • Aorta
  • Diaphragm
  • Vertebral bodies
  • Base of heart (correct)

Where does the thoracic duct originate from?

  • Posterior mediastinum
  • Aortic hiatus
  • Cisternal chyli in the abdomen (correct)
  • Superior mediastinum

What is the thoracic duct usually beaded due to?

<p>Numerous valves (A)</p> Signup and view all the answers

What is the location of the superior mediastinum?

<p>Superior to the transverse thoracic plane (B)</p> Signup and view all the answers

At which vertebral level does the thoracic duct cross to the left, posterior to the esophagus and ascends into the superior mediastinum?

<p>The vertebral level is not specified (C)</p> Signup and view all the answers

What is the order of the major structures in the superior mediastinum, from anterior to posterior?

<ol> <li>thymus, 2. veins, 3. arteries, 4. airway, 5. alimentary tract, 6. lymphatic trunks (D)</li> </ol> Signup and view all the answers

Which of the following structures does not receive lymph from the thoracic duct?

<p>Right superior quadrant (D)</p> Signup and view all the answers

What is the primary lymphoid organ located in the anterior mediastinum and inferior to the neck?

<p>Thymus (D)</p> Signup and view all the answers

Where do the veins of the thymus drain into?

<p>Left branchiocephalic, internal thoracic, and inferior thyroid veins (A)</p> Signup and view all the answers

What is the origin of the right and left brachiocephalic veins?

<p>Union of the internal jugular and subclavian veins (D)</p> Signup and view all the answers

Where do the lymph vessels of the thymus end in?

<p>Parasternal, branchiocephalic, and tracheobronchial lymph nodes (C)</p> Signup and view all the answers

How do tumor cells enter the systemic circulation and reach the lungs?

<p>By invading the wall of a sinusoid or venule of the lung (D)</p> Signup and view all the answers

Which lymph nodes are often enlarged in bronchogenic carcinoma?

<p>Supraclavicular lymph nodes (D)</p> Signup and view all the answers

Why is the visceral pleura relatively insensitive to pain?

<p>It receives no somatic nerve fibers for general sensation (A)</p> Signup and view all the answers

If the parietal pleura produces local pain, where will it be projected?

<p>Dermatomes supplied by the same spinal cord segments (D)</p> Signup and view all the answers

Which dermatomes are affected if the costal and peripheral part of the diaphragmatic pleura is affected?

<p>Thoracic and abdominal wall (B)</p> Signup and view all the answers

From where do the axio-appendicular muscles extend?

<p>From the thoracic cage to the upper limb bones (A)</p> Signup and view all the answers

What is the most common site of metastasis from breast cancer?

<p>Axillary lymph nodes (D)</p> Signup and view all the answers

Where do cancer cells from breast spread to through venous routes?

<p>Vertebrae and cranium (C)</p> Signup and view all the answers

What is the boundary that divides the mediastinum into superior and inferior parts?

<p>Transverse thoracic line (D)</p> Signup and view all the answers

Where is the mediastinum located?

<p>In the central thoracic cavity (A)</p> Signup and view all the answers

What is the superior termination point of the superior mediastinum?

<p>Thoracic aperture (C)</p> Signup and view all the answers

What are the three compartments that the thoracic cavity is divided into?

<p>Right and left pulmonary cavity, Central mediastinum (D)</p> Signup and view all the answers

What type of pleura covers the lungs and tracheobronchial tree?

<p>Visceral pleura (A)</p> Signup and view all the answers

Where can breast cancer in women spread to?

<p>Axillary lymph nodes, bone, pleura, lung, and skin (C)</p> Signup and view all the answers

What surrounds the parietal pleura?

<p>Endothoracic fascia, suprapleural membrane, and mediastinum (C)</p> Signup and view all the answers

What are the three parts of the parietal pleura?

<p>Costal, diaphragmatic, and mediastinal (B)</p> Signup and view all the answers

How can you differentiate between parietal and visceral pleura?

<p>By inserting a hand into a balloon and feeling the pressure (A)</p> Signup and view all the answers

Where do lungs develop from during the embryonic period?

<p>Pericardioperitoneal canals (B)</p> Signup and view all the answers

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