posterior mediastinum

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pos·te·ri·or me·di·as·ti·num

lies between the pericardium anteriorly and the vertebral column posteriorly and below the level of the plane that interesects the sternal angle and the T4-5 intervertebral disc. It contains the descending aorta, thoracic duct, esophagus, azygos veins, and vagus nerves.

posterior mediastinum

the irregularly shaped lower part of the mediastinum parallel with the vertebral column. It is bounded ventrally by the pericardium, inferiorly by the diaphragm, dorsally by the vertebral column from the fourth to the twelfth thoracic vertebra, and laterally by the mediastinal pleurae. It contains the bifurcation of the trachea, two primary bronchi, the esophagus, the thoracic duct, many large lymph nodes, and various vessels, such as the thoracic part of the aortic arch. Compare anterior mediastinum, middle mediastinum, superior mediastinum.
References in periodicals archive ?
2] They are most typically found in the posterior mediastinum and the retroperitoneal space, and less commonly in the adrenal glands, head and neck, and are extremely rare in the pelvis.
Rarely, they can be found in ectopic locations such as the neck, or middle or posterior mediastinum.
The exact mechanism of chylopericardium in this case is unknown, but the postulated mechanism is that lymphatic leak from the subcarinal, peribronchial lymph nodes and lymphatic channels (which are dissected to allow for bronchial anastomosis) creates efflux of lymph into the posterior mediastinum.
Schwannomas are the frequently encountered neurogenic tumors of the thorax, especially in the posterior mediastinum, whereas in the peripheral nervous system, they are relatively uncommon and usually arise from one of the main nerves of the limbs.
The transverse process should disappear from view and the pleura will be seen occupying the sonogram completely, with its medial edge curving anteriorly as it approaches the posterior mediastinum (Figure 2).
The reason is anatomical spread through the retroperitoneal fascial compartment, which extends through the posterior mediastinum to the neck.
Retroperitoneum and posterior mediastinum are the most common locations for GN.
He concluded that thoracoscopic exposure of the posterior mediastinum allows complete drainage of substantial mediastinal contamination and is less painful than thotacotomy incisions.
Infection had spread to the superior mediastinum in 4 patients (1 of whom died) and to the posterior mediastinum in 2.
Other locations may be the neck and posterior mediastinum.
Dysphagia is a rare symptom that occurs as the result of invasion of the posterior mediastinum and produces esophageal obstruction.
Main considerations in the differential diagnosis of EMH are tumours of the posterior mediastinum, including neurogenic masses, lymphoma, paravertebral abscesses, extrapleural cysts, lateral meningoceles, mediastinal lymph node hyperplasia, and primary and metastatic malignant neoplasms.

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