Postmediastinum refers to the anatomical region located behind the mediastinum in the human body. The mediastinum is the central compartment of the chest, located between the lungs and extending from the sternum to the spine. It contains important structures such as the heart, major blood vessels, esophagus, trachea, and thymus gland. On the other hand, the region behind the mediastinum is referred to as the postmediastinum.
The postmediastinum is comprised primarily of the posterior mediastinum, which is further divided into two regions: the superior and inferior posterior mediastinum. The posterior mediastinum consists of structures lying on the posterior (back) aspect of the mediastinum, usually including parts of the esophagus, thoracic aorta, thoracic duct, sympathetic ganglia, and thoracic spine. Additionally, the inferior posterior mediastinum houses structures such as the diaphragm, lower esophagus, descending thoracic aorta, and lymph nodes.
Radiologically, the postmediastinum is located behind the mediastinum on imaging studies such as X-rays, computed tomography (CT) scans, or magnetic resonance imaging (MRI) of the chest. Understanding the precise anatomical arrangement and structures within the postmediastinum is crucial for accurate diagnosis and planning appropriate treatment strategies for conditions or diseases affecting this region.
In summary, the postmediastinum refers to the anatomical space behind the mediastinum, which contains important structures and plays a significant role in various physiological functions within the chest cavity.
