Pneumothorax is the most frequently reported cause of tracheal deviation from pressure buildup. This condition happens when excess air builds up in your chest cavity and can't escape. It's also known as a collapsed lung. The growth of cancerous tumors, lymph nodes, and glands can also create pressure in your chest.

Which way does trachea deviate in pneumothorax?

Meaning, that if one side of the chest cavity has an increase in pressure (such as in the case of a pneumothorax) the trachea will shift towards the opposing side. The trachea is the tube that carries air from the throat to the lungs. It is also commonly referred to as the windpipe.

Which way does the mediastinum shift in a pneumothorax?

A large left sided pneumothorax is present with near complete collapse of the left lung. Mediastinal shift towards the right is present in keeping with tension (a medical emergency).