Luftsichel sign

Contents

Definition

Lucency outlining the aortic arch on frontal view. Indicates Left upper lobe collapse. The lucency occurs as a result of the superior segment of the left lower lobe migrating superiorly and abutting the aortic knob due to volume loss of the left upper lobe.

Findings

A crescent of lucency surrounding the aortic knob on the frontal view. may be accompanied by findings of Left Upper Lobe Collapse.

Differential

Learn More

Examples

Luftsichel Sign in a patient with left upper lobe collapse
image courtesy of Andetta Hunsaker MD
left upper lobe collapse
image courtesy of Andetta Hunsaker MD
Luftsichel Sign in a patient with left upper lobe collapse
image courtesy of Andetta Hunsaker MD
left upper lobe collapse
image courtesy of Andetta Hunsaker MD


Radiology Wiki : Pulmonary Curriculum :Signs in Thoracic Radiology

Looking for something?

Use the form below to search the wiki:

 

Still not finding what you're looking for? Drop a comment on a post or contact us so we can take care of it!