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mediastinum

anatomy
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Category: Science & Tech
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mediastinoscopy
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Cleveland Clinic - Mediastinum (Mar. 18, 2024)
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mediastinum, the anatomic region located between the lungs that contains all the principal tissues and organs of the chest except the lungs. It extends from the sternum, or breastbone, back to the vertebral column and is bounded laterally by the pericardium, the membrane enclosing the heart, and the mediastinal pleurae, membranes that are continuous with those lining the thoracic cage. The mediastinum is a division of the thoracic cavity; it contains the heart, thymus gland, portions of the esophagus and trachea, and other structures. For clinical purposes it is traditionally divided into the anterior, middle, posterior, and superior regions.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Adam Augustyn.