Additional pediatric resources: GeneralPediatrics.com | PediatricEducation.org | SearchingPediatrics.com
Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed
Etiology/Pathophysiology:
Respiratory syncitial virus is the most common cause in early life.
Other causes include parainfluenza, adenovirus, and influenza
viruses. Inflammation begins in the respiratory mucosa of the major
bronchi and spreads transmurally and endobronchially into the
adjacent interstitium as well as into the peripheral air spaces.
Pathology:
Not applicable
Imaging Findings:
Usually central in location. Hilar and vascular radiographic
sharpness is lost due to bronchial wall thickening with peribronchial
interstitial edema and inflammatory infiltrate. Due to the central
airway involvement there is peripheral air trapping and
hyperinflation. Patchy pulmonary densities can be seen and are
usually due to subsegmental atelectasis.
DDX:
References:
See References Chapter.
Additional pediatric resources: GeneralPediatrics.com | PediatricEducation.org | SearchingPediatrics.com
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