|A transverse section of the thorax, showing the contents of the middle and the posterior mediastinum.|
|Gray's||subject #239 1093|
The posterior mediastinum is an irregular triangular space running parallel with the vertebral column.
It is bounded:
- anteriorally by the pericardium (in front of)
- inferiorally by the thoracic surface of the diaphragm (below).
- superiorally by the transverse thoracic plane (above). This plane is marked by an imaginary line travelling through the manubriosternal joint to the dividing line between the fourth and fifth thoracic vertebrae.
- posteriorally by the bodies of the vertebral column from the lower border of the fourth to the twelfth thoracic vertebra (behind).
- laterally: by the mediastinal pleura (on either side)
- thoracic duct
- some lymph glands
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.