Which findings on CT scan suggest bronchiectasis?

Updated: Sep 15, 2020
  • Author: Ethan E Emmons, MD; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Answer

Noteworthy CT findings in bronchiectasis include the following:

  • Cylindrical bronchiectasis has parallel tram track lines, or it may have a signet-ring appearance composed of a dilated bronchus cut in a horizontal section with an adjacent pulmonary artery representing the stone

  • The diameter of the bronchus lumen is normally 1-1.5 times that of the adjacent vessel; a diameter greater than 1.5 times that of the adjacent vessel suggests bronchiectasis

  • Varicose bronchiectasis has irregular or beaded bronchi, with alternating areas of dilatation and constriction

  • Cystic bronchiectasis has large cystic spaces and a honeycomb appearance; this contrasts with the blebs of emphysema, which have thinner walls and are not accompanied by proximal airway abnormalities

See Workup for more detail.


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