Presentation
Preoperative chest x-ray
Patient Data
Age: 65 years
Gender: Male
Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines."
From the case:
Saber sheath trachea
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Info

Diffuse narrowing of the intrathoracic trachea. Extrathoracic trachea has a normal calibre.
From the case:
Saber sheath trachea
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Info

Side-to-side narrowing of the intrathoracic trachea. It is longer (anterior-posterior) than it is wide (side-to-side).
Case Discussion
Most commonly associated with emphysema or COPD.