The division of the mediastinum by French and German anatomists into an anterior and a posterior, the trachea forming the partition between them, has been adopted in this paper for descriptive purposes.
In four cases of acute suppuration of the posterior mediastinum that have come under my observation, the focus of infection was in the neck, and there was extension into the mediastinum. For that reason, I wish to review briefly the arrangement of certain parts of the deep cervical fascia (Fig. 1).
The pretracheal fascia covers the trachea in front and blends laterally with the sheath of the vessels of the neck. In front of this fascia are the sternothyroid, the sternohyoid and the omohyoid muscles, and the space between this fascia and the muscles is the previsceral space of Henke. The prevertebral fascia, covering the bodies of the vertebrae and muscles attached to the spine, joins the sheath