Peribronchial cuffing

Peribronchial cuffing refers to a radiographic term used to describe haziness or increased density around the walls of a bronchus or large bronchiole seen end-on, both on plain radiographs and on CT. It is sometimes described as a "doughnut sign". When viewed tangentially, it can give the appearance of tram tracks .

It may either represent bronchial wall thickening or fluid around bronchi due to lymphatic congestion .

It can be seen in a number of pathologies, which include:

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