Left Lung: Mediastinal Surface Anatomy

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Questions and Answers

Which structure creates a wide concave impression on the mediastinal surface of the left lung, anterior to the hilum?

Pulmonary trunk.
Left ventricle of the heart. (correct)
Arch of the aorta.
Descending thoracic aorta.

What anatomical structure courses through the interval between the left common carotid and left subclavian arteries superior to the left lung hilum?

Left brachiocephalic vein.
Right recurrent laryngeal nerve.
Right vagus nerve.
Left phrenic nerve. (correct)

Which structure creates the most posterior groove on the mediastinal surface of the left lung, behind the hilum and pulmonary ligament?

Esophagus.
Descending thoracic aorta. (correct)
Left brachiocephalic vein.
Left subclavian artery.

A surgeon operating near the anterior border of the mediastinal surface of the left lung must be cautious of which structure, superficial to the pericardium?

<p>Left phrenic nerve. (D)</p> Signup and view all the answers

Which of the following structures creates a longitudinal groove immediately behind the groove for the left brachiocephalic vein as they course superiorly, near the mediastinal surface of the left lung?

<p>Left subclavian artery. (A)</p> Signup and view all the answers

Flashcards

Cardiac Impression (Left Lung)

A concave area on the left lung's mediastinal surface, accommodating the heart's left ventricle. The left phrenic nerve and pericardiacophrenic vessels are found here, outside the pericardium.

Groove for Aortic Arch (Left Lung)

A groove on the left lung above the hilum that houses the aortic arch.

Longitudinal Grooves Above Aortic Arch (Left Lung)

Three longitudinal grooves located above the aortic arch impression that accommodate the left brachiocephalic vein, the left subclavian artery, and the esophagus (with the thoracic duct to its left).

Descending Thoracic Aorta Groove (Left Lung)

A groove behind the hilum of the left lung carrying blood away from heart.

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Esophageal Area (Left Lung)

A small area behind the hilum and pulmonary ligament of the left lung, related to the esophagus.

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Study Notes

The mediastinal surface of the left lung features several impressions and grooves due to its relationship with mediastinal structures.

Anterior to Hilum and Pulmonary Ligament

Cardiac impression: A large concave area accommodating the left ventricle.
The left phrenic nerve and left pericardicophrenic vessels are located outside the pericardium in this region.
A small area superior to the cardiac impression, along the anterior border, is related to the pulmonary trunk and remnants of the thymus gland.

Above the Hilum

There is a broad, concave groove that houses the arch of the aorta.

Superior to the Aortic Arch

Three longitudinal grooves are present.
From anterior to posterior:
- Groove for the left brachiocephalic vein.
- Groove for the left subclavian artery.
- The left vagus and left phrenic nerves are situated between the left common carotid and left subclavian arteries.
- Groove for the esophagus, with the thoracic duct located on its left border.

Posterior to Hilum and Pulmonary Ligament

Structures include:
- A wide groove for the descending thoracic aorta.
- A small area related to the esophagus.

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Description

An overview of the mediastinal surface of the left lung, focusing on the cardiac impression and grooves for the aorta, brachiocephalic vein, and subclavian artery. It also covers the location of the phrenic and vagus nerves, and the esophagus.