Aortic knob
Nodus aortae
- Synonym: Aortic knuckle
Definition
The aortic knob (aortic knucle) is a radiographic configuration of the distal aortic arhc on a frontal chest X-Ray (CXR) formed by a portion of the descending aorta and the foreshortened aortic arch, looking like a laterally-projecting bulge, (medial aspect of the aorta is fused with the mediastinum on CXR).
References
Text by Antoine Micheau, MD - Copyright IMAIOS
