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 ?
Liposarcoma of the posterior mediastinum in a child.
In his yearly routine medical examination, chest CT (August 04, 2016) revealed a cystic mass in the posterior mediastinum.
Neuroblastoma can arise from sympathetic ganglion cells anywhere in the body and the most common locations are the adrenal medulla (35%), extra-adrenal retroperitoneum (30%-35%), posterior mediastinum (20%) and less commonly, the neck and pelvis.
The frequency of a mediastinal teratoma arising in the posterior mediastinum is approximately 3%.
Single cysts located in the posterior mediastinum encompass derivatives of the primitive foregut (enteric, bronchogenic, and esophageal duplication) and, occasionally, atypically located pericardial cysts.
Traditionally, cysts found within the posterior mediastinum have been universally diagnosed as masses of neurogenic or bronchogenic origin.
In adults 65% of lesions arise in anterior mediastinum, 10% in middle mediastinum and 25% in posterior mediastinum.
The most common location was anterior or posterior mediastinum.
Mediastinal masses maybe benign or malignant tumours that arise within different regions of the mediastinum and are characterized according to the location they originate from; anterior, middle and posterior mediastinum.
Type I, also called sliding hernias, occurs when the GE junction migrates through the hiatus into the posterior mediastinum.
Pneumorrhachis results from the communication between the posterior mediastinum and epidural space since there are no fascial barriers to prevent it [19].
2 cm well demarcated, heterogeneously enhancing mass with areas of fat attenuation and some prominent internal vessels within the right superior, posterior mediastinum (Figure 2).

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