Figure 17.

A coronal view of spaces around trachea and esophagus is seen. The trachea and esophagus divide the central zone of the mediastinum into left-sided and right-sided compartments. The tracheal bifurcation and the main bronchi divide the central zone into supracarinal and subcarinal areas. The spaces in the supracarinal area include the paratracheal spaces (on the right and left sides of the upper trachea), the pretracheal space, the AP window, and the retrotracheal space. The spaces in the subcarinal areas include the precarinal and the subcarinal spaces in continuity with the azygoesophageal and preaortic recesses