Pulmonary arterial webs

In thoracic imaging, a pulmonary arterial web is given to describe fibrotic bands which are delicate ribbonlike structures anchored to the vessel wall at two ends with a free unattached mid portion. Sometimes a web also used to describe a bands that have branches and form networks of varying complexity. The term should not be confused with pulmonary artery banding which is a surgical technique to reduce pulmonary overcirculation in certain congenital heart diseases 4.

Pulmonary arterial webs are a late sequelae of chronic pulmonary thromboembolism.

Radigraphic features


There are typically seen as thin lines surrounded by contrast material. These bands generally range around 0.3-2 cm in length and from less than 0.1-0.3 cm in width 2. They are usually oriented along the direction of blood flow along the long axis of the vessel. 

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Article information

rID: 25979
System: Chest
Tag: cases
Synonyms or Alternate Spellings:
  • Pulmonary arterial bands
  • Pulmonary artery webs
  • Pulmonary arterial fibrotic webs
  • Pulmonary arterial fibrotic bands
  • Pulmonary arterial band
  • Pulmonary arterial fibrotic web
  • Pulmonary arterial fibrotic band

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Cases and figures

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