A saber-sheath trachea also known as scabbard trachea is a trachea that has an abnormal shape. The posterior area of the trachea increases in diameter while the lateral measurement decreases.

CT scan of a saber-sheath trachea in a patient with COPD

Causes

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It can occur in chronic obstructive pulmonary disease or prolonged bilateral compression on it as in goitre.

References

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  • Mosby's Medical, Nursing, & Allied Health Dictionary. Edition 5, 1998 p7B48.