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The frown sign in tracheobroncheomalacia
The frown sign in tracheobroncheomalacia
Axial computed tomography (CT) scan shows narrowing of the tracheal sagittal diameter and deformation of the tracheal shape, the so called "frown sign." Incidental note is made of an aortic arch aneurysm.
Courtesy of Paul Stark, MD.
Graphic 121179 Version 1.0
