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Bronchial stenosis CT.JPG
CT scan of a bronchial stenosis (arrow) that resulted from tracheobronchial injury
Classification and external resources
MeSH D003251

A stenosis (/stəˈnsɨs/;[1][2] plural: stenoses, /stəˈnˌsz/) (from Ancient Greek στένωσις, "narrowing") is an abnormal narrowing in a blood vessel or other tubular organ or structure. It is also sometimes called a stricture (as in urethral stricture).[3]

Stricture as a term is usually used when narrowing is caused by contraction of smooth muscle (e.g., achalasia, prinzmetal angina); stenosis is usually used when narrowing is caused by lesion that reduces the space of lumen (e.g., atherosclerosis).[citation needed] The term coarctation is another synonym,[4] but is commonly used only in the context of aortic coarctation.

Restenosis is the recurrence of stenosis after a procedure.


Stenoses of the vascular type are often associated with unusual blood sounds resulting from turbulent flow over the narrowed blood vessel. This sound can be made audible by a stethoscope, but diagnosis is generally made or confirmed with some form of medical imaging.



The resulting syndrome depends on the structure affected.

Examples of vascular stenotic lesions include:

The types of stenoses in heart valves are:

Stenoses/strictures of other bodily structures/organs include:

See also[edit]



  1. ^ OED 2nd edition, 1989, as /stɪˈnəʊsɪs/.
  2. ^ Entry "stenosis" in Merriam-Webster Online Dictionary.
  3. ^ "Dorlands Medical Dictionary:stenosis". Retrieved 2010-05-05. 
  4. ^ "coarctation" at Dorland's Medical Dictionary

External links[edit]