What would cause the trachea to be pushed to one side?

The trachea can be pushed to one side due to several conditions, including a tension pneumothorax, where air accumulates in the pleural cavity and compresses the lung, causing the mediastinum to shift. Other causes include large masses or tumors in the chest, such as a goiter or lung cancer, and conditions like pleural effusion, where fluid accumulation in one side of the chest pushes the trachea toward the opposite side. Additionally, trauma or structural anomalies can also result in tracheal deviation.