Saber-sheath trachea

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.

Causes

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

gollark: I want to have too many hatchlings. Much better than too few.

gollark: They're probably between coppers and golds in rarity.

gollark: Lots!

gollark: There are other rules. Weird ones. Stupid ones. Unlisted ones. Arbitrary ones.

gollark: I can probably do >4 aeons, though not very neatly.

References

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

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