A flattened appearance of the aortic knob and pulmonary trunk occurs as a result of __________ collapse.

Question

Quizplus · Accepted Answer

The left lower lobe collapse would cause a flattened appearance of the aortic knob and pulmonary trunk on a chest x-ray. This is because the left lung is located more inferiorly than the right lung, and therefore, collapse of the left lower lobe would cause compression of these structures against the spine.

A Flattened Appearance of the Aortic Knob and Pulmonary Trunk